A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3629160 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 30 34 36 40 45 51 60 68 72 85 90 102 120 136 153 170 180 204 255 306 340 360 408 510 593 612 680 765 1,020 1,186 1,224 1,530 1,779 2,040 2,372 2,965 3,060 3,558 4,744 5,337 5,930 6,120 7,116 8,895 10,081 10,674 11,860 14,232 17,790 20,162 21,348 23,720 26,685 30,243 35,580 40,324 42,696 50,405 53,370 60,486 71,160 80,648 90,729 100,810 106,740 120,972 151,215 181,458 201,620 213,480 241,944 302,430 362,916 403,240 453,645 604,860 725,832 907,290 1,209,720 1,814,580 and 3,629,160, with no remainder.
Since 3,629,160 cannot be divided by just 1 and 3,629,160, it is not a prime number.