Q: Is 644,000 a Composite Number?

Why is 644,000 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 644,000 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 23 25 28 32 35 40 46 50 56 70 80 92 100 112 115 125 140 160 161 175 184 200 224 230 250 280 322 350 368 400 460 500 560 575 644 700 736 800 805 875 920 1,000 1,120 1,150 1,288 1,400 1,610 1,750 1,840 2,000 2,300 2,576 2,800 2,875 3,220 3,500 3,680 4,000 4,025 4,600 5,152 5,600 5,750 6,440 7,000 8,050 9,200 11,500 12,880 14,000 16,100 18,400 20,125 23,000 25,760 28,000 32,200 40,250 46,000 64,400 80,500 92,000 128,800 161,000 322,000 and 644,000, with no remainder.

Since 644,000 cannot be divided by just 1 and 644,000, 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).