A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8444700 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 15 18 20 22 25 30 33 36 44 45 50 55 60 66 75 90 99 100 110 132 150 165 180 198 220 225 275 300 330 396 450 495 550 660 825 853 900 990 1,100 1,650 1,706 1,980 2,475 2,559 3,300 3,412 4,265 4,950 5,118 7,677 8,530 9,383 9,900 10,236 12,795 15,354 17,060 18,766 21,325 25,590 28,149 30,708 37,532 38,385 42,650 46,915 51,180 56,298 63,975 76,770 84,447 85,300 93,830 112,596 127,950 140,745 153,540 168,894 187,660 191,925 234,575 255,900 281,490 337,788 383,850 422,235 469,150 562,980 703,725 767,700 844,470 938,300 1,407,450 1,688,940 2,111,175 2,814,900 4,222,350 and 8,444,700, with no remainder.
Since 8,444,700 cannot be divided by just 1 and 8,444,700, it is not a prime number.