Q: Is 355,640 a Prime Number?
A: No, 355,640 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 355640 can be evenly divided by 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 523 680 1,046 2,092 2,615 4,184 5,230 8,891 10,460 17,782 20,920 35,564 44,455 71,128 88,910 177,820 and 355,640, with no remainder.
Since 355,640 cannot be divided by just 1 and 355,640, it is not a prime number.