A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5720160 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 17 20 24 30 32 34 40 48 51 60 68 80 85 96 102 120 136 160 170 204 240 255 272 340 408 480 510 544 680 701 816 1,020 1,360 1,402 1,632 2,040 2,103 2,720 2,804 3,505 4,080 4,206 5,608 7,010 8,160 8,412 10,515 11,216 11,917 14,020 16,824 21,030 22,432 23,834 28,040 33,648 35,751 42,060 47,668 56,080 59,585 67,296 71,502 84,120 95,336 112,160 119,170 143,004 168,240 178,755 190,672 238,340 286,008 336,480 357,510 381,344 476,680 572,016 715,020 953,360 1,144,032 1,430,040 1,906,720 2,860,080 and 5,720,160, with no remainder.
Since 5,720,160 cannot be divided by just 1 and 5,720,160, it is not a prime number.