Q: Is 555,428 a Prime Number?
A: No, 555,428 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 555428 can be evenly divided by 1 2 4 191 382 727 764 1,454 2,908 138,857 277,714 and 555,428, with no remainder.
Since 555,428 cannot be divided by just 1 and 555,428, it is not a prime number.