Q: Is 1,620,240 a Composite Number?

Why is 1,620,240 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 1,620,240 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 43 48 60 80 86 120 129 157 172 215 240 258 314 344 430 471 516 628 645 688 785 860 942 1,032 1,256 1,290 1,570 1,720 1,884 2,064 2,355 2,512 2,580 3,140 3,440 3,768 4,710 5,160 6,280 6,751 7,536 9,420 10,320 12,560 13,502 18,840 20,253 27,004 33,755 37,680 40,506 54,008 67,510 81,012 101,265 108,016 135,020 162,024 202,530 270,040 324,048 405,060 540,080 810,120 and 1,620,240, with no remainder.

Since 1,620,240 cannot be divided by just 1 and 1,620,240, 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).