Q: Is 2,771,840 a Composite Number?

Why is 2,771,840 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 2,771,840 can be evenly divided by 1 2 4 5 8 10 16 20 32 40 61 64 71 80 122 128 142 160 244 284 305 320 355 488 568 610 640 710 976 1,136 1,220 1,420 1,952 2,272 2,440 2,840 3,904 4,331 4,544 4,880 5,680 7,808 8,662 9,088 9,760 11,360 17,324 19,520 21,655 22,720 34,648 39,040 43,310 45,440 69,296 86,620 138,592 173,240 277,184 346,480 554,368 692,960 1,385,920 and 2,771,840, with no remainder.

Since 2,771,840 cannot be divided by just 1 and 2,771,840, 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).