Q: Is 640,320 a Composite Number?

Why is 640,320 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 640,320 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 29 30 32 40 46 48 58 60 64 69 80 87 92 96 115 116 120 138 145 160 174 184 192 230 232 240 276 290 320 345 348 368 435 460 464 480 552 580 667 690 696 736 870 920 928 960 1,104 1,160 1,334 1,380 1,392 1,472 1,740 1,840 1,856 2,001 2,208 2,320 2,668 2,760 2,784 3,335 3,480 3,680 4,002 4,416 4,640 5,336 5,520 5,568 6,670 6,960 7,360 8,004 9,280 10,005 10,672 11,040 13,340 13,920 16,008 20,010 21,344 22,080 26,680 27,840 32,016 40,020 42,688 53,360 64,032 80,040 106,720 128,064 160,080 213,440 320,160 and 640,320, with no remainder.

Since 640,320 cannot be divided by just 1 and 640,320, 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).