A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2044980 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 54 60 63 70 84 90 105 108 126 135 140 180 189 210 252 270 315 378 420 540 541 630 756 945 1,082 1,260 1,623 1,890 2,164 2,705 3,246 3,780 3,787 4,869 5,410 6,492 7,574 8,115 9,738 10,820 11,361 14,607 15,148 16,230 18,935 19,476 22,722 24,345 29,214 32,460 34,083 37,870 45,444 48,690 56,805 58,428 68,166 73,035 75,740 97,380 102,249 113,610 136,332 146,070 170,415 204,498 227,220 292,140 340,830 408,996 511,245 681,660 1,022,490 and 2,044,980, with no remainder.
Since 2,044,980 cannot be divided by just 1 and 2,044,980, it is not a prime number.