Q: Is 400,628 a Prime Number?
A: No, 400,628 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 400628 can be evenly divided by 1 2 4 47 94 188 2,131 4,262 8,524 100,157 200,314 and 400,628, with no remainder.
Since 400,628 cannot be divided by just 1 and 400,628, it is not a prime number.