A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4403400 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 41 50 60 75 82 100 120 123 150 164 179 200 205 246 300 328 358 410 492 537 600 615 716 820 895 984 1,025 1,074 1,230 1,432 1,640 1,790 2,050 2,148 2,460 2,685 3,075 3,580 4,100 4,296 4,475 4,920 5,370 6,150 7,160 7,339 8,200 8,950 10,740 12,300 13,425 14,678 17,900 21,480 22,017 24,600 26,850 29,356 35,800 36,695 44,034 53,700 58,712 73,390 88,068 107,400 110,085 146,780 176,136 183,475 220,170 293,560 366,950 440,340 550,425 733,900 880,680 1,100,850 1,467,800 2,201,700 and 4,403,400, with no remainder.
Since 4,403,400 cannot be divided by just 1 and 4,403,400, it is not a prime number.