Q: Is 557,840 a Prime Number?
A: No, 557,840 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 557840 can be evenly divided by 1 2 4 5 8 10 16 19 20 38 40 76 80 95 152 190 304 367 380 734 760 1,468 1,520 1,835 2,936 3,670 5,872 6,973 7,340 13,946 14,680 27,892 29,360 34,865 55,784 69,730 111,568 139,460 278,920 and 557,840, with no remainder.
Since 557,840 cannot be divided by just 1 and 557,840, it is not a prime number.