A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5683440 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 17 20 21 24 28 30 34 35 40 42 48 51 56 60 68 70 80 84 85 102 105 112 119 120 136 140 168 170 199 204 210 238 240 255 272 280 336 340 357 398 408 420 476 510 560 595 597 680 714 796 816 840 952 995 1,020 1,190 1,194 1,360 1,393 1,428 1,592 1,680 1,785 1,904 1,990 2,040 2,380 2,388 2,786 2,856 2,985 3,184 3,383 3,570 3,980 4,080 4,179 4,760 4,776 5,572 5,712 5,970 6,766 6,965 7,140 7,960 8,358 9,520 9,552 10,149 11,144 11,940 13,532 13,930 14,280 15,920 16,716 16,915 20,298 20,895 22,288 23,681 23,880 27,064 27,860 28,560 33,432 33,830 40,596 41,790 47,362 47,760 50,745 54,128 55,720 66,864 67,660 71,043 81,192 83,580 94,724 101,490 111,440 118,405 135,320 142,086 162,384 167,160 189,448 202,980 236,810 270,640 284,172 334,320 355,215 378,896 405,960 473,620 568,344 710,430 811,920 947,240 1,136,688 1,420,860 1,894,480 2,841,720 and 5,683,440, with no remainder.
Since 5,683,440 cannot be divided by just 1 and 5,683,440, it is not a prime number.