Q: Is 728,431 a Prime Number?
A: No, 728,431 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 728431 can be evenly divided by 1 11 66,221 and 728,431, with no remainder.
Since 728,431 cannot be divided by just 1 and 728,431, it is not a prime number.