Q: Is 783,840 a Prime Number?
A: No, 783,840 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 783840 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 32 40 46 48 60 69 71 80 92 96 115 120 138 142 160 184 213 230 240 276 284 345 355 368 426 460 480 552 568 690 710 736 852 920 1,065 1,104 1,136 1,380 1,420 1,633 1,704 1,840 2,130 2,208 2,272 2,760 2,840 3,266 3,408 3,680 4,260 4,899 5,520 5,680 6,532 6,816 8,165 8,520 9,798 11,040 11,360 13,064 16,330 17,040 19,596 24,495 26,128 32,660 34,080 39,192 48,990 52,256 65,320 78,384 97,980 130,640 156,768 195,960 261,280 391,920 and 783,840, with no remainder.
Since 783,840 cannot be divided by just 1 and 783,840, it is not a prime number.