Q: Is 685,440 a Composite Number?

Why is 685,440 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 685,440 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 17 18 20 21 24 28 30 32 34 35 36 40 42 45 48 51 56 60 63 64 68 70 72 80 84 85 90 96 102 105 112 119 120 126 128 136 140 144 153 160 168 170 180 192 204 210 224 238 240 252 255 272 280 288 306 315 320 336 340 357 360 384 408 420 448 476 480 504 510 544 560 576 595 612 630 640 672 680 714 720 765 816 840 896 952 960 1,008 1,020 1,071 1,088 1,120 1,152 1,190 1,224 1,260 1,344 1,360 1,428 1,440 1,530 1,632 1,680 1,785 1,904 1,920 2,016 2,040 2,142 2,176 2,240 2,380 2,448 2,520 2,688 2,720 2,856 2,880 3,060 3,264 3,360 3,570 3,808 4,032 4,080 4,284 4,480 4,760 4,896 5,040 5,355 5,440 5,712 5,760 6,120 6,528 6,720 7,140 7,616 8,064 8,160 8,568 9,520 9,792 10,080 10,710 10,880 11,424 12,240 13,440 14,280 15,232 16,320 17,136 19,040 19,584 20,160 21,420 22,848 24,480 28,560 32,640 34,272 38,080 40,320 42,840 45,696 48,960 57,120 68,544 76,160 85,680 97,920 114,240 137,088 171,360 228,480 342,720 and 685,440, with no remainder.

Since 685,440 cannot be divided by just 1 and 685,440, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).