Q: Is 398,440 a Prime Number?
A: No, 398,440 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 398440 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 35 40 56 70 140 280 1,423 2,846 5,692 7,115 9,961 11,384 14,230 19,922 28,460 39,844 49,805 56,920 79,688 99,610 199,220 and 398,440, with no remainder.
Since 398,440 cannot be divided by just 1 and 398,440, it is not a prime number.