A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3264800 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 25 28 32 35 40 44 50 53 55 56 70 77 80 88 100 106 110 112 140 154 160 175 176 200 212 220 224 265 275 280 308 350 352 371 385 400 424 440 530 550 560 583 616 700 742 770 800 848 880 1,060 1,100 1,120 1,166 1,232 1,325 1,400 1,484 1,540 1,696 1,760 1,855 1,925 2,120 2,200 2,332 2,464 2,650 2,800 2,915 2,968 3,080 3,710 3,850 4,081 4,240 4,400 4,664 5,300 5,600 5,830 5,936 6,160 7,420 7,700 8,162 8,480 8,800 9,275 9,328 10,600 11,660 11,872 12,320 14,575 14,840 15,400 16,324 18,550 18,656 20,405 21,200 23,320 29,150 29,680 30,800 32,648 37,100 40,810 42,400 46,640 58,300 59,360 61,600 65,296 74,200 81,620 93,280 102,025 116,600 130,592 148,400 163,240 204,050 233,200 296,800 326,480 408,100 466,400 652,960 816,200 1,632,400 and 3,264,800, with no remainder.
Since 3,264,800 cannot be divided by just 1 and 3,264,800, it is not a prime number.