A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8920600 can be evenly divided by 1 2 4 5 8 10 13 20 25 26 40 47 50 52 65 73 94 100 104 130 146 188 200 235 260 292 325 365 376 470 520 584 611 650 730 940 949 1,175 1,222 1,300 1,460 1,825 1,880 1,898 2,350 2,444 2,600 2,920 3,055 3,431 3,650 3,796 4,700 4,745 4,888 6,110 6,862 7,300 7,592 9,400 9,490 12,220 13,724 14,600 15,275 17,155 18,980 23,725 24,440 27,448 30,550 34,310 37,960 44,603 47,450 61,100 68,620 85,775 89,206 94,900 122,200 137,240 171,550 178,412 189,800 223,015 343,100 356,824 446,030 686,200 892,060 1,115,075 1,784,120 2,230,150 4,460,300 and 8,920,600, with no remainder.
Since 8,920,600 cannot be divided by just 1 and 8,920,600, it is not a prime number.