Q: Is 428,578 a Prime Number?
A: No, 428,578 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 428578 can be evenly divided by 1 2 421 509 842 1,018 214,289 and 428,578, with no remainder.
Since 428,578 cannot be divided by just 1 and 428,578, it is not a prime number.