A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8028150 can be evenly divided by 1 2 3 5 6 10 13 15 23 25 26 30 39 46 50 65 69 75 78 115 130 138 150 179 195 230 299 325 345 358 390 537 575 598 650 690 895 897 975 1,074 1,150 1,495 1,725 1,790 1,794 1,950 2,327 2,685 2,990 3,450 4,117 4,475 4,485 4,654 5,370 6,981 7,475 8,234 8,950 8,970 11,635 12,351 13,425 13,962 14,950 20,585 22,425 23,270 24,702 26,850 34,905 41,170 44,850 53,521 58,175 61,755 69,810 102,925 107,042 116,350 123,510 160,563 174,525 205,850 267,605 308,775 321,126 349,050 535,210 617,550 802,815 1,338,025 1,605,630 2,676,050 4,014,075 and 8,028,150, with no remainder.
Since 8,028,150 cannot be divided by just 1 and 8,028,150, it is not a prime number.