A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4792480 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 88 110 112 140 154 160 176 220 224 280 308 352 385 389 440 560 616 770 778 880 1,120 1,232 1,540 1,556 1,760 1,945 2,464 2,723 3,080 3,112 3,890 4,279 5,446 6,160 6,224 7,780 8,558 10,892 12,320 12,448 13,615 15,560 17,116 21,395 21,784 27,230 29,953 31,120 34,232 42,790 43,568 54,460 59,906 62,240 68,464 85,580 87,136 108,920 119,812 136,928 149,765 171,160 217,840 239,624 299,530 342,320 435,680 479,248 599,060 684,640 958,496 1,198,120 2,396,240 and 4,792,480, with no remainder.
Since 4,792,480 cannot be divided by just 1 and 4,792,480, it is not a prime number.