Q: Is 628,815 a Prime Number?
A: No, 628,815 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 628815 can be evenly divided by 1 3 5 11 15 33 37 55 103 111 165 185 309 407 515 555 1,133 1,221 1,545 2,035 3,399 3,811 5,665 6,105 11,433 16,995 19,055 41,921 57,165 125,763 209,605 and 628,815, with no remainder.
Since 628,815 cannot be divided by just 1 and 628,815, it is not a prime number.