Q: Is 640,880 a Prime Number?
A: No, 640,880 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 640880 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 8,011 16,022 32,044 40,055 64,088 80,110 128,176 160,220 320,440 and 640,880, with no remainder.
Since 640,880 cannot be divided by just 1 and 640,880, it is not a prime number.