Q: Is 428,638 a Prime Number?
A: No, 428,638 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 428638 can be evenly divided by 1 2 7 14 17 34 119 238 1,801 3,602 12,607 25,214 30,617 61,234 214,319 and 428,638, with no remainder.
Since 428,638 cannot be divided by just 1 and 428,638, it is not a prime number.