A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4776200 can be evenly divided by 1 2 4 5 8 10 11 13 20 22 25 26 40 44 50 52 55 65 88 100 104 110 130 143 167 200 220 260 275 286 325 334 440 520 550 572 650 668 715 835 1,100 1,144 1,300 1,336 1,430 1,670 1,837 2,171 2,200 2,600 2,860 3,340 3,575 3,674 4,175 4,342 5,720 6,680 7,150 7,348 8,350 8,684 9,185 10,855 14,300 14,696 16,700 17,368 18,370 21,710 23,881 28,600 33,400 36,740 43,420 45,925 47,762 54,275 73,480 86,840 91,850 95,524 108,550 119,405 183,700 191,048 217,100 238,810 367,400 434,200 477,620 597,025 955,240 1,194,050 2,388,100 and 4,776,200, with no remainder.
Since 4,776,200 cannot be divided by just 1 and 4,776,200, it is not a prime number.