Q: Is 640,000 a Composite Number?
A: Yes, 640,000 is a composite number.
The number 640,000 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1,000 1,024 1,250 1,280 1,600 2,000 2,500 2,560 3,200 4,000 5,000 5,120 6,400 8,000 10,000 12,800 16,000 20,000 25,600 32,000 40,000 64,000 80,000 128,000 160,000 320,000 and 640,000, with no remainder.
Since 640,000 cannot be divided by just 1 and 640,000, it is a composite number.