A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4403700 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 25 27 28 30 35 36 42 45 50 54 60 63 70 75 84 90 100 105 108 126 135 140 150 175 180 189 210 225 233 252 270 300 315 350 378 420 450 466 525 540 630 675 699 700 756 900 932 945 1,050 1,165 1,260 1,350 1,398 1,575 1,631 1,890 2,097 2,100 2,330 2,700 2,796 3,150 3,262 3,495 3,780 4,194 4,660 4,725 4,893 5,825 6,291 6,300 6,524 6,990 8,155 8,388 9,450 9,786 10,485 11,650 12,582 13,980 14,679 16,310 17,475 18,900 19,572 20,970 23,300 24,465 25,164 29,358 31,455 32,620 34,950 40,775 41,940 44,037 48,930 52,425 58,716 62,910 69,900 73,395 81,550 88,074 97,860 104,850 122,325 125,820 146,790 157,275 163,100 176,148 209,700 220,185 244,650 293,580 314,550 366,975 440,370 489,300 629,100 733,950 880,740 1,100,925 1,467,900 2,201,850 and 4,403,700, with no remainder.
Since 4,403,700 cannot be divided by just 1 and 4,403,700, it is not a prime number.