Q: Is 823,640 a Prime Number?
A: No, 823,640 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 823640 can be evenly divided by 1 2 4 5 8 10 20 40 59 118 236 295 349 472 590 698 1,180 1,396 1,745 2,360 2,792 3,490 6,980 13,960 20,591 41,182 82,364 102,955 164,728 205,910 411,820 and 823,640, with no remainder.
Since 823,640 cannot be divided by just 1 and 823,640, it is not a prime number.