A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4429600 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 49 50 56 70 80 98 100 112 113 140 160 175 196 200 224 226 245 280 350 392 400 452 490 560 565 700 784 791 800 904 980 1,120 1,130 1,225 1,400 1,568 1,582 1,808 1,960 2,260 2,450 2,800 2,825 3,164 3,616 3,920 3,955 4,520 4,900 5,537 5,600 5,650 6,328 7,840 7,910 9,040 9,800 11,074 11,300 12,656 15,820 18,080 19,600 19,775 22,148 22,600 25,312 27,685 31,640 39,200 39,550 44,296 45,200 55,370 63,280 79,100 88,592 90,400 110,740 126,560 138,425 158,200 177,184 221,480 276,850 316,400 442,960 553,700 632,800 885,920 1,107,400 2,214,800 and 4,429,600, with no remainder.
Since 4,429,600 cannot be divided by just 1 and 4,429,600, it is not a prime number.