Q: Is 1,621,840 a Composite Number?

Why is 1,621,840 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 1,621,840 can be evenly divided by 1 2 4 5 8 10 11 16 19 20 22 38 40 44 55 76 80 88 95 97 110 152 176 190 194 209 220 304 380 388 418 440 485 760 776 836 880 970 1,045 1,067 1,520 1,552 1,672 1,843 1,940 2,090 2,134 3,344 3,686 3,880 4,180 4,268 5,335 7,372 7,760 8,360 8,536 9,215 10,670 14,744 16,720 17,072 18,430 20,273 21,340 29,488 36,860 40,546 42,680 73,720 81,092 85,360 101,365 147,440 162,184 202,730 324,368 405,460 810,920 and 1,621,840, with no remainder.

Since 1,621,840 cannot be divided by just 1 and 1,621,840, 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).