Q: Is 643,950 a Composite Number?

Why is 643,950 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 643,950 can be evenly divided by 1 2 3 5 6 9 10 15 18 25 27 30 45 50 53 54 75 81 90 106 135 150 159 162 225 243 265 270 318 405 450 477 486 530 675 795 810 954 1,215 1,325 1,350 1,431 1,590 2,025 2,385 2,430 2,650 2,862 3,975 4,050 4,293 4,770 6,075 7,155 7,950 8,586 11,925 12,150 12,879 14,310 21,465 23,850 25,758 35,775 42,930 64,395 71,550 107,325 128,790 214,650 321,975 and 643,950, with no remainder.

Since 643,950 cannot be divided by just 1 and 643,950, 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).