Q: Is 278,240 a Prime Number?
A: No, 278,240 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 278240 can be evenly divided by 1 2 4 5 8 10 16 20 32 37 40 47 74 80 94 148 160 185 188 235 296 370 376 470 592 740 752 940 1,184 1,480 1,504 1,739 1,880 2,960 3,478 3,760 5,920 6,956 7,520 8,695 13,912 17,390 27,824 34,780 55,648 69,560 139,120 and 278,240, with no remainder.
Since 278,240 cannot be divided by just 1 and 278,240, it is not a prime number.