A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3595680 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 32 33 36 40 44 45 48 55 60 66 72 80 88 90 96 99 110 120 132 144 160 165 176 180 198 220 227 240 264 288 330 352 360 396 440 454 480 495 528 660 681 720 792 880 908 990 1,056 1,135 1,320 1,362 1,440 1,584 1,760 1,816 1,980 2,043 2,270 2,497 2,640 2,724 3,168 3,405 3,632 3,960 4,086 4,540 4,994 5,280 5,448 6,810 7,264 7,491 7,920 8,172 9,080 9,988 10,215 10,896 12,485 13,620 14,982 15,840 16,344 18,160 19,976 20,430 21,792 22,473 24,970 27,240 29,964 32,688 36,320 37,455 39,952 40,860 44,946 49,940 54,480 59,928 65,376 74,910 79,904 81,720 89,892 99,880 108,960 112,365 119,856 149,820 163,440 179,784 199,760 224,730 239,712 299,640 326,880 359,568 399,520 449,460 599,280 719,136 898,920 1,198,560 1,797,840 and 3,595,680, with no remainder.
Since 3,595,680 cannot be divided by just 1 and 3,595,680, it is not a prime number.