Q: Is 328,640 a Prime Number?
A: No, 328,640 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 328640 can be evenly divided by 1 2 4 5 8 10 13 16 20 26 32 40 52 64 65 79 80 104 130 158 160 208 260 316 320 395 416 520 632 790 832 1,027 1,040 1,264 1,580 2,054 2,080 2,528 3,160 4,108 4,160 5,056 5,135 6,320 8,216 10,270 12,640 16,432 20,540 25,280 32,864 41,080 65,728 82,160 164,320 and 328,640, with no remainder.
Since 328,640 cannot be divided by just 1 and 328,640, it is not a prime number.