Q: How Many Digits in the Number 400,424,409?

 A: The number 400,424,409 has 9 digits.

How does 400,424,409 have 9 digits?

You simply count the number of digits from the first number to the last. Like this:


400424409
Digit # 123456789

What are the number of digits of the numbers near 400,424,409?

400,424,407400,424,408400,424,410400,424,411
9999

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