Q: Is 688,440 a Prime Number?
A: No, 688,440 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 688440 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 5,737 11,474 17,211 22,948 28,685 34,422 45,896 57,370 68,844 86,055 114,740 137,688 172,110 229,480 344,220 and 688,440, with no remainder.
Since 688,440 cannot be divided by just 1 and 688,440, it is not a prime number.