Q: Is 1,781,920 a Composite Number?

Why is 1,781,920 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 1,781,920 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 28 32 35 37 40 43 56 70 74 80 86 112 140 148 160 172 185 215 224 259 280 296 301 344 370 430 518 560 592 602 688 740 860 1,036 1,120 1,184 1,204 1,295 1,376 1,480 1,505 1,591 1,720 2,072 2,408 2,590 2,960 3,010 3,182 3,440 4,144 4,816 5,180 5,920 6,020 6,364 6,880 7,955 8,288 9,632 10,360 11,137 12,040 12,728 15,910 20,720 22,274 24,080 25,456 31,820 41,440 44,548 48,160 50,912 55,685 63,640 89,096 111,370 127,280 178,192 222,740 254,560 356,384 445,480 890,960 and 1,781,920, with no remainder.

Since 1,781,920 cannot be divided by just 1 and 1,781,920, 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).