Q: Is 1,645,440 a Composite Number?

Why is 1,645,440 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 1,645,440 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 160 192 240 320 384 480 640 857 960 1,714 1,920 2,571 3,428 4,285 5,142 6,856 8,570 10,284 12,855 13,712 17,140 20,568 25,710 27,424 34,280 41,136 51,420 54,848 68,560 82,272 102,840 109,696 137,120 164,544 205,680 274,240 329,088 411,360 548,480 822,720 and 1,645,440, with no remainder.

Since 1,645,440 cannot be divided by just 1 and 1,645,440, 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).