How many native speakers of Arabic are there?
It depends on how you define "Arabic". If you are referring
exclusively to Modern Standard Arabic (Fus-ha), the official Arabic
language, there are probably fewer than 10 million native speakers.
Most people who speak MSA have learnt it as a second language. If
you define "Arabic" as any of the Arabic dialects (some of which
are not mutually intelligible), then you have roughly 290-300
million native speakers of Arabic.