Q: Is 638,908 a Prime Number?
A: No, 638,908 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 638908 can be evenly divided by 1 2 4 211 422 757 844 1,514 3,028 159,727 319,454 and 638,908, with no remainder.
Since 638,908 cannot be divided by just 1 and 638,908, it is not a prime number.