Q: Is 39,978 a Composite Number?
A: Yes, 39,978 is a composite number.
The number 39,978 can be evenly divided by 1 2 3 6 9 18 2,221 4,442 6,663 13,326 19,989 and 39,978, with no remainder.
Since 39,978 cannot be divided by just 1 and 39,978, it is a composite number.