Q: Is 428,878 a Prime Number?
A: No, 428,878 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 428878 can be evenly divided by 1 2 214,439 and 428,878, with no remainder.
Since 428,878 cannot be divided by just 1 and 428,878, it is not a prime number.