A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5328400 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 25 28 35 40 44 50 55 56 70 77 80 88 100 110 112 140 154 173 175 176 200 220 275 280 308 346 350 385 400 440 550 560 616 692 700 770 865 880 1,100 1,211 1,232 1,384 1,400 1,540 1,730 1,903 1,925 2,200 2,422 2,768 2,800 3,080 3,460 3,806 3,850 4,325 4,400 4,844 6,055 6,160 6,920 7,612 7,700 8,650 9,515 9,688 12,110 13,321 13,840 15,224 15,400 17,300 19,030 19,376 24,220 26,642 30,275 30,448 30,800 34,600 38,060 47,575 48,440 53,284 60,550 66,605 69,200 76,120 95,150 96,880 106,568 121,100 133,210 152,240 190,300 213,136 242,200 266,420 333,025 380,600 484,400 532,840 666,050 761,200 1,065,680 1,332,100 2,664,200 and 5,328,400, with no remainder.
Since 5,328,400 cannot be divided by just 1 and 5,328,400, it is not a prime number.