Q: Is 1,687,840 a Composite Number?

Why is 1,687,840 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 1,687,840 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 70 77 80 88 110 112 137 140 154 160 176 220 224 274 280 308 352 385 440 548 560 616 685 770 880 959 1,096 1,120 1,232 1,370 1,507 1,540 1,760 1,918 2,192 2,464 2,740 3,014 3,080 3,836 4,384 4,795 5,480 6,028 6,160 7,535 7,672 9,590 10,549 10,960 12,056 12,320 15,070 15,344 19,180 21,098 21,920 24,112 30,140 30,688 38,360 42,196 48,224 52,745 60,280 76,720 84,392 105,490 120,560 153,440 168,784 210,980 241,120 337,568 421,960 843,920 and 1,687,840, with no remainder.

Since 1,687,840 cannot be divided by just 1 and 1,687,840, 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).