A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 6208800 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 16 20 24 25 26 30 32 39 40 48 50 52 60 65 75 78 80 96 100 104 120 130 150 156 160 195 199 200 208 240 260 300 312 325 390 398 400 416 480 520 597 600 624 650 780 796 800 975 995 1,040 1,194 1,200 1,248 1,300 1,560 1,592 1,950 1,990 2,080 2,388 2,400 2,587 2,600 2,985 3,120 3,184 3,900 3,980 4,776 4,975 5,174 5,200 5,970 6,240 6,368 7,761 7,800 7,960 9,552 9,950 10,348 10,400 11,940 12,935 14,925 15,522 15,600 15,920 19,104 19,900 20,696 23,880 25,870 29,850 31,044 31,200 31,840 38,805 39,800 41,392 47,760 51,740 59,700 62,088 64,675 77,610 79,600 82,784 95,520 103,480 119,400 124,176 129,350 155,220 159,200 194,025 206,960 238,800 248,352 258,700 310,440 388,050 413,920 477,600 517,400 620,880 776,100 1,034,800 1,241,760 1,552,200 2,069,600 3,104,400 and 6,208,800, with no remainder.
Since 6,208,800 cannot be divided by just 1 and 6,208,800, it is not a prime number.