A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4940320 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 70 77 80 88 110 112 140 154 160 176 220 224 280 308 352 385 401 440 560 616 770 802 880 1,120 1,232 1,540 1,604 1,760 2,005 2,464 2,807 3,080 3,208 4,010 4,411 5,614 6,160 6,416 8,020 8,822 11,228 12,320 12,832 14,035 16,040 17,644 22,055 22,456 28,070 30,877 32,080 35,288 44,110 44,912 56,140 61,754 64,160 70,576 88,220 89,824 112,280 123,508 141,152 154,385 176,440 224,560 247,016 308,770 352,880 449,120 494,032 617,540 705,760 988,064 1,235,080 2,470,160 and 4,940,320, with no remainder.
Since 4,940,320 cannot be divided by just 1 and 4,940,320, it is not a prime number.