A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3582800 can be evenly divided by 1 2 4 5 8 10 13 16 20 25 26 40 50 52 53 65 80 100 104 106 130 169 200 208 212 260 265 325 338 400 424 520 530 650 676 689 845 848 1,040 1,060 1,300 1,325 1,352 1,378 1,690 2,120 2,600 2,650 2,704 2,756 3,380 3,445 4,225 4,240 5,200 5,300 5,512 6,760 6,890 8,450 8,957 10,600 11,024 13,520 13,780 16,900 17,225 17,914 21,200 27,560 33,800 34,450 35,828 44,785 55,120 67,600 68,900 71,656 89,570 137,800 143,312 179,140 223,925 275,600 358,280 447,850 716,560 895,700 1,791,400 and 3,582,800, with no remainder.
Since 3,582,800 cannot be divided by just 1 and 3,582,800, it is not a prime number.