A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4983264 can be evenly divided by 1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 32 33 36 39 44 48 52 66 72 78 88 96 99 104 117 121 132 143 144 156 176 198 208 234 242 264 286 288 312 352 363 396 416 429 468 484 528 572 624 726 792 858 936 968 1,056 1,089 1,144 1,248 1,287 1,331 1,452 1,573 1,584 1,716 1,872 1,936 2,178 2,288 2,574 2,662 2,904 3,146 3,168 3,432 3,744 3,872 3,993 4,356 4,576 4,719 5,148 5,324 5,808 6,292 6,864 7,986 8,712 9,438 10,296 10,648 11,616 11,979 12,584 13,728 14,157 15,972 17,303 17,424 18,876 20,592 21,296 23,958 25,168 28,314 31,944 34,606 34,848 37,752 41,184 42,592 47,916 50,336 51,909 56,628 63,888 69,212 75,504 95,832 103,818 113,256 127,776 138,424 151,008 155,727 191,664 207,636 226,512 276,848 311,454 383,328 415,272 453,024 553,696 622,908 830,544 1,245,816 1,661,088 2,491,632 and 4,983,264, with no remainder.
Since 4,983,264 cannot be divided by just 1 and 4,983,264, it is not a prime number.