A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3358200 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 25 29 30 40 50 58 60 75 87 100 116 120 145 150 174 193 200 232 290 300 348 386 435 579 580 600 696 725 772 870 965 1,158 1,160 1,450 1,544 1,740 1,930 2,175 2,316 2,895 2,900 3,480 3,860 4,350 4,632 4,825 5,597 5,790 5,800 7,720 8,700 9,650 11,194 11,580 14,475 16,791 17,400 19,300 22,388 23,160 27,985 28,950 33,582 38,600 44,776 55,970 57,900 67,164 83,955 111,940 115,800 134,328 139,925 167,910 223,880 279,850 335,820 419,775 559,700 671,640 839,550 1,119,400 1,679,100 and 3,358,200, with no remainder.
Since 3,358,200 cannot be divided by just 1 and 3,358,200, it is not a prime number.