Q: Is 638,438 a Prime Number?
A: No, 638,438 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 638438 can be evenly divided by 1 2 19 38 53 106 317 634 1,007 2,014 6,023 12,046 16,801 33,602 319,219 and 638,438, with no remainder.
Since 638,438 cannot be divided by just 1 and 638,438, it is not a prime number.