A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3449600 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 25 28 32 35 40 44 49 50 55 56 64 70 77 80 88 98 100 110 112 128 140 154 160 175 176 196 200 220 224 245 256 275 280 308 320 350 352 385 392 400 440 448 490 539 550 560 616 640 700 704 770 784 800 880 896 980 1,078 1,100 1,120 1,225 1,232 1,280 1,400 1,408 1,540 1,568 1,600 1,760 1,792 1,925 1,960 2,156 2,200 2,240 2,450 2,464 2,695 2,800 2,816 3,080 3,136 3,200 3,520 3,850 3,920 4,312 4,400 4,480 4,900 4,928 5,390 5,600 6,160 6,272 6,400 7,040 7,700 7,840 8,624 8,800 8,960 9,800 9,856 10,780 11,200 12,320 12,544 13,475 14,080 15,400 15,680 17,248 17,600 19,600 19,712 21,560 22,400 24,640 26,950 30,800 31,360 34,496 35,200 39,200 43,120 44,800 49,280 53,900 61,600 62,720 68,992 70,400 78,400 86,240 98,560 107,800 123,200 137,984 156,800 172,480 215,600 246,400 313,600 344,960 431,200 492,800 689,920 862,400 1,724,800 and 3,449,600, with no remainder.
Since 3,449,600 cannot be divided by just 1 and 3,449,600, it is not a prime number.