A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3436160 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 59 64 65 70 80 91 104 112 118 128 130 140 160 182 208 224 236 260 280 295 320 364 413 416 448 455 472 520 560 590 640 728 767 826 832 896 910 944 1,040 1,120 1,180 1,456 1,534 1,652 1,664 1,820 1,888 2,065 2,080 2,240 2,360 2,912 3,068 3,304 3,640 3,776 3,835 4,130 4,160 4,480 4,720 5,369 5,824 6,136 6,608 7,280 7,552 7,670 8,260 8,320 9,440 10,738 11,648 12,272 13,216 14,560 15,340 16,520 18,880 21,476 24,544 26,432 26,845 29,120 30,680 33,040 37,760 42,952 49,088 52,864 53,690 58,240 61,360 66,080 85,904 98,176 107,380 122,720 132,160 171,808 214,760 245,440 264,320 343,616 429,520 490,880 687,232 859,040 1,718,080 and 3,436,160, with no remainder.
Since 3,436,160 cannot be divided by just 1 and 3,436,160, it is not a prime number.