A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4847904 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 31 32 36 48 54 62 72 93 96 108 124 144 181 186 216 248 279 288 362 372 432 496 543 558 724 744 837 864 992 1,086 1,116 1,448 1,488 1,629 1,674 2,172 2,232 2,896 2,976 3,258 3,348 4,344 4,464 4,887 5,611 5,792 6,516 6,696 8,688 8,928 9,774 11,222 13,032 13,392 16,833 17,376 19,548 22,444 26,064 26,784 33,666 39,096 44,888 50,499 52,128 67,332 78,192 89,776 100,998 134,664 151,497 156,384 179,552 201,996 269,328 302,994 403,992 538,656 605,988 807,984 1,211,976 1,615,968 2,423,952 and 4,847,904, with no remainder.
Since 4,847,904 cannot be divided by just 1 and 4,847,904, it is not a prime number.