Q: Is 3,978 a Composite Number?
A: Yes, 3,978 is a composite number.
The number 3,978 can be evenly divided by 1 2 3 6 9 13 17 18 26 34 39 51 78 102 117 153 221 234 306 442 663 1,326 1,989 and 3,978, with no remainder.
Since 3,978 cannot be divided by just 1 and 3,978, it is a composite number.