A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1880802 can be evenly divided by 1 2 3 6 7 9 11 14 18 21 22 23 33 42 46 59 63 66 69 77 99 118 126 138 154 161 177 198 207 231 253 322 354 413 414 462 483 506 531 649 693 759 826 966 1,062 1,239 1,298 1,357 1,386 1,449 1,518 1,771 1,947 2,277 2,478 2,714 2,898 3,542 3,717 3,894 4,071 4,543 4,554 5,313 5,841 7,434 8,142 9,086 9,499 10,626 11,682 12,213 13,629 14,927 15,939 18,998 24,426 27,258 28,497 29,854 31,878 40,887 44,781 56,994 81,774 85,491 89,562 104,489 134,343 170,982 208,978 268,686 313,467 626,934 940,401 and 1,880,802, with no remainder.
Since 1,880,802 cannot be divided by just 1 and 1,880,802, it is not a prime number.