Q: Is 726,640 a Prime Number?
A: No, 726,640 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 726640 can be evenly divided by 1 2 4 5 8 10 16 20 31 40 62 80 124 155 248 293 310 496 586 620 1,172 1,240 1,465 2,344 2,480 2,930 4,688 5,860 9,083 11,720 18,166 23,440 36,332 45,415 72,664 90,830 145,328 181,660 363,320 and 726,640, with no remainder.
Since 726,640 cannot be divided by just 1 and 726,640, it is not a prime number.