Q: Is 278,440 a Prime Number?
A: No, 278,440 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 278440 can be evenly divided by 1 2 4 5 8 10 20 40 6,961 13,922 27,844 34,805 55,688 69,610 139,220 and 278,440, with no remainder.
Since 278,440 cannot be divided by just 1 and 278,440, it is not a prime number.