Q: Is 636,428 a Prime Number?
A: No, 636,428 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 636428 can be evenly divided by 1 2 4 13 26 52 12,239 24,478 48,956 159,107 318,214 and 636,428, with no remainder.
Since 636,428 cannot be divided by just 1 and 636,428, it is not a prime number.