A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4550880 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 32 38 40 48 57 60 76 80 95 96 114 120 152 160 190 228 240 285 304 380 456 480 499 570 608 760 912 998 1,140 1,497 1,520 1,824 1,996 2,280 2,495 2,994 3,040 3,992 4,560 4,990 5,988 7,485 7,984 9,120 9,481 9,980 11,976 14,970 15,968 18,962 19,960 23,952 28,443 29,940 37,924 39,920 47,405 47,904 56,886 59,880 75,848 79,840 94,810 113,772 119,760 142,215 151,696 189,620 227,544 239,520 284,430 303,392 379,240 455,088 568,860 758,480 910,176 1,137,720 1,516,960 2,275,440 and 4,550,880, with no remainder.
Since 4,550,880 cannot be divided by just 1 and 4,550,880, it is not a prime number.