Q: Is 2,780 a Composite Number?
A: Yes, 2,780 is a composite number.
The number 2,780 can be evenly divided by 1 2 4 5 10 20 139 278 556 695 1,390 and 2,780, with no remainder.
Since 2,780 cannot be divided by just 1 and 2,780, it is a composite number.