3.5 million = 3500000 so 7 Seven digits (individually). Three digits (not counting repeats).
can you saw me how can you write one and a half million in digits
250 million = 250,000,000. There are 9 digits in this number.
Eight Digits: 30,000,000
100,000,000 = nine digits.
There are 8 digits in 65,600,000
A million is one number. If you refer to the digits, a million has seven digits. "Millions" can have seven digits or more.