Q: Is 628,820 a Prime Number?
A: No, 628,820 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 628820 can be evenly divided by 1 2 4 5 10 20 23 46 92 115 230 460 1,367 2,734 5,468 6,835 13,670 27,340 31,441 62,882 125,764 157,205 314,410 and 628,820, with no remainder.
Since 628,820 cannot be divided by just 1 and 628,820, it is not a prime number.