Q: Is 689,440 a Prime Number?
A: No, 689,440 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 689440 can be evenly divided by 1 2 4 5 8 10 16 20 31 32 40 62 80 124 139 155 160 248 278 310 496 556 620 695 992 1,112 1,240 1,390 2,224 2,480 2,780 4,309 4,448 4,960 5,560 8,618 11,120 17,236 21,545 22,240 34,472 43,090 68,944 86,180 137,888 172,360 344,720 and 689,440, with no remainder.
Since 689,440 cannot be divided by just 1 and 689,440, it is not a prime number.