A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2044000 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 56 70 73 80 100 112 125 140 146 160 175 200 224 250 280 292 350 365 400 500 511 560 584 700 730 800 875 1,000 1,022 1,120 1,168 1,400 1,460 1,750 1,825 2,000 2,044 2,336 2,555 2,800 2,920 3,500 3,650 4,000 4,088 5,110 5,600 5,840 7,000 7,300 8,176 9,125 10,220 11,680 12,775 14,000 14,600 16,352 18,250 20,440 25,550 28,000 29,200 36,500 40,880 51,100 58,400 63,875 73,000 81,760 102,200 127,750 146,000 204,400 255,500 292,000 408,800 511,000 1,022,000 and 2,044,000, with no remainder.
Since 2,044,000 cannot be divided by just 1 and 2,044,000, it is not a prime number.