A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8986380 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 26 30 39 41 52 60 65 78 82 123 130 156 164 195 205 246 260 281 390 410 492 533 562 615 780 820 843 1,066 1,124 1,230 1,405 1,599 1,686 2,132 2,460 2,665 2,810 3,198 3,372 3,653 4,215 5,330 5,620 6,396 7,306 7,995 8,430 10,660 10,959 11,521 14,612 15,990 16,860 18,265 21,918 23,042 31,980 34,563 36,530 43,836 46,084 54,795 57,605 69,126 73,060 109,590 115,210 138,252 149,773 172,815 219,180 230,420 299,546 345,630 449,319 599,092 691,260 748,865 898,638 1,497,730 1,797,276 2,246,595 2,995,460 4,493,190 and 8,986,380, with no remainder.
Since 8,986,380 cannot be divided by just 1 and 8,986,380, it is not a prime number.