Q: Is 396,640 a Prime Number?
A: No, 396,640 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 396640 can be evenly divided by 1 2 4 5 8 10 16 20 32 37 40 67 74 80 134 148 160 185 268 296 335 370 536 592 670 740 1,072 1,184 1,340 1,480 2,144 2,479 2,680 2,960 4,958 5,360 5,920 9,916 10,720 12,395 19,832 24,790 39,664 49,580 79,328 99,160 198,320 and 396,640, with no remainder.
Since 396,640 cannot be divided by just 1 and 396,640, it is not a prime number.