Q: Is 723,640 a Prime Number?
A: No, 723,640 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 723640 can be evenly divided by 1 2 4 5 8 10 20 40 79 158 229 316 395 458 632 790 916 1,145 1,580 1,832 2,290 3,160 4,580 9,160 18,091 36,182 72,364 90,455 144,728 180,910 361,820 and 723,640, with no remainder.
Since 723,640 cannot be divided by just 1 and 723,640, it is not a prime number.