Q: Is 388,638 a Prime Number?
A: No, 388,638 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 388638 can be evenly divided by 1 2 3 6 9 18 27 54 81 162 2,399 4,798 7,197 14,394 21,591 43,182 64,773 129,546 194,319 and 388,638, with no remainder.
Since 388,638 cannot be divided by just 1 and 388,638, it is not a prime number.