Q: Is 1,811,640 a Composite Number?

Why is 1,811,640 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 1,811,640 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 31 40 60 62 93 120 124 155 186 248 310 372 465 487 620 744 930 974 1,240 1,461 1,860 1,948 2,435 2,922 3,720 3,896 4,870 5,844 7,305 9,740 11,688 14,610 15,097 19,480 29,220 30,194 45,291 58,440 60,388 75,485 90,582 120,776 150,970 181,164 226,455 301,940 362,328 452,910 603,880 905,820 and 1,811,640, with no remainder.

Since 1,811,640 cannot be divided by just 1 and 1,811,640, 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).