Q: Is 7,821,320 a Composite Number?

Why is 7,821,320 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 7,821,320 can be evenly divided by 1 2 4 5 8 10 13 20 26 40 52 65 89 104 130 169 178 260 338 356 445 520 676 712 845 890 1,157 1,352 1,690 1,780 2,197 2,314 3,380 3,560 4,394 4,628 5,785 6,760 8,788 9,256 10,985 11,570 15,041 17,576 21,970 23,140 30,082 43,940 46,280 60,164 75,205 87,880 120,328 150,410 195,533 300,820 391,066 601,640 782,132 977,665 1,564,264 1,955,330 3,910,660 and 7,821,320, with no remainder.

Since 7,821,320 cannot be divided by just 1 and 7,821,320, 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).