Q: Is 1,811,840 a Composite Number?

Why is 1,811,840 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 1,811,840 can be evenly divided by 1 2 4 5 8 10 16 19 20 32 38 40 64 76 80 95 128 149 152 160 190 298 304 320 380 596 608 640 745 760 1,192 1,216 1,490 1,520 2,384 2,432 2,831 2,980 3,040 4,768 5,662 5,960 6,080 9,536 11,324 11,920 12,160 14,155 19,072 22,648 23,840 28,310 45,296 47,680 56,620 90,592 95,360 113,240 181,184 226,480 362,368 452,960 905,920 and 1,811,840, with no remainder.

Since 1,811,840 cannot be divided by just 1 and 1,811,840, 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).