Namba isiyo sahihi imeandikwa hapa.

A natural breakdown is:

• namba = number
• isiyo sahihi = not correct / incorrect / wrong
• imeandikwa = has been written / is written
• hapa = here

So the whole sentence means something like:

• The incorrect number has been written here
• or A wrong number is written here

The exact English wording depends on context.

Because isiyo sahihi is being used to describe the noun namba.

In English, we often use a simple adjective before the noun: wrong number.
In Swahili, one very common way to express this idea is with a relative expression:

• namba isiyo sahihi = number that is not correct

By contrast:

• Namba si sahihi means The number is not correct

That is a full statement by itself, not a modifier inside a noun phrase.

So:

• namba isiyo sahihi imeandikwa hapa = the number that is not correct has been written here
• namba si sahihi = the number is not correct

isiyo is a relative negative form meaning roughly that is not for this noun class.

It can be understood as:

• i- = agreement with namba
• -si- = negative
• -yo = relative element

So:

• isiyo sahihi = that is not correct

This is a very useful pattern in Swahili. It lets you build phrases like:

• kitabu kisicho kipya = a book that is not new
• mtu asiye tayari = a person who is not ready
• namba isiyo sahihi = a number that is not correct

Because sahihi is one of many adjectives or adjective-like words in Swahili that often do not change form.

Some native Swahili adjectives do show noun-class agreement, but many borrowed words, especially ones like sahihi (from Arabic), often remain unchanged.

So you get:

• namba sahihi = correct number
• namba isiyo sahihi = incorrect number

The agreement is already being shown by isiyo, so sahihi itself does not need to change.

imeandikwa comes from the verb andika = write.

It breaks down like this:

• i- = subject marker agreeing with namba
• -me- = perfect tense marker
• andik- = verb root write
• -w- = passive
• -a = final vowel

So literally it means:

• it has been written

Since the subject is namba, the meaning is:

• the number has been written

Because it is passive, the sentence focuses on the number, not on who wrote it.

Swahili uses the passive here for the same reason English often does:

• the important thing is what was written, not who wrote it

So:

• Namba isiyo sahihi imeandikwa hapa = The wrong number has been written here

If you wanted an active sentence, you would need to mention or imply the writer, for example:

• Mtu ameandika namba isiyo sahihi hapa = Someone has written the wrong number here

The passive is very natural when the writer is unknown or unimportant.

Here it is understood as singular.

You can tell from the agreement:

• i- in isiyo
• i- in imeandikwa

Those markers show singular agreement for this noun class.

If it were plural, you would normally get:

• Namba zisizo sahihi zimeandikwa hapa = Incorrect numbers have been written here

Notice the changes:

• isiyo → zisizo
• imeandikwa → zimeandikwa

Even though namba itself often looks the same in singular and plural, the agreement words tell you the number.

Swahili normally does not have separate words for English articles like the and a/an.

So namba can mean:

• a number
• the number

Which one sounds best depends on context.

That means this sentence could be translated in more than one way:

• The wrong number has been written here
• A wrong number has been written here
• The incorrect number is written here

English must choose an article, but Swahili usually does not mark that distinction directly.

The word order is very normal for Swahili.

Structure:

• Namba = noun
• isiyo sahihi = modifier describing the noun
• imeandikwa = verb
• hapa = place adverb

So the sentence is literally close to:

• Number not-correct has-been-written here

A key thing to remember is that in Swahili, modifiers usually come after the noun, not before it as in English.

Compare:

• English: wrong number
• Swahili: namba isiyo sahihi

Yes, sometimes.

The tense marker -me- often gives a completed action with a present result. So imeandikwa can mean:

• has been written
• or, in some contexts, is written

The difference is about emphasis:

• has been written emphasizes the completed action
• is written emphasizes the present result

In this sentence, both can work depending on context, but has been written here is often the clearest first translation for learners.

Yes. In context, namba isiyo sahihi works very naturally as wrong number or incorrect number.

Literally it is more like:

• number that is not correct

But in real translation, you usually do not need to keep that full literal structure. A natural English equivalent is simply:

• wrong number

So in this sentence, a smooth translation is:

• The wrong number has been written here

Namba is very common and completely normal. You may also see nambari in some contexts.

In many everyday situations, namba is the most common form, especially for things like:

• phone numbers
• house numbers
• identification numbers
• bus numbers

So in this sentence, namba is perfectly natural.