A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4487760 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 23 24 30 36 40 45 46 48 60 69 72 80 90 92 115 120 138 144 180 184 207 230 240 271 276 345 360 368 414 460 542 552 690 720 813 828 920 1,035 1,084 1,104 1,355 1,380 1,626 1,656 1,840 2,070 2,168 2,439 2,710 2,760 3,252 3,312 4,065 4,140 4,336 4,878 5,420 5,520 6,233 6,504 8,130 8,280 9,756 10,840 12,195 12,466 13,008 16,260 16,560 18,699 19,512 21,680 24,390 24,932 31,165 32,520 37,398 39,024 48,780 49,864 56,097 62,330 65,040 74,796 93,495 97,560 99,728 112,194 124,660 149,592 186,990 195,120 224,388 249,320 280,485 299,184 373,980 448,776 498,640 560,970 747,960 897,552 1,121,940 1,495,920 2,243,880 and 4,487,760, with no remainder.
Since 4,487,760 cannot be divided by just 1 and 4,487,760, it is not a prime number.