The number 1,844,370 can be evenly divided by 1 2 3 5 6 9 10 11 15 18 22 23 27 30 33 45 46 54 55 66 69 81 90 99 110 115 135 138 162 165 198 207 230 243 253 270 297 330 345 405 414 486 495 506 594 621 690 729 759 810 891 990 1,035 1,215 1,242 1,265 1,458 1,485 1,518 1,782 1,863 2,070 2,277 2,430 2,530 2,673 2,970 3,105 3,645 3,726 3,795 4,455 4,554 5,346 5,589 6,210 6,831 7,290 7,590 8,019 8,910 9,315 11,178 11,385 13,365 13,662 16,038 16,767 18,630 20,493 22,770 26,730 27,945 33,534 34,155 40,095 40,986 55,890 61,479 68,310 80,190 83,835 102,465 122,958 167,670 184,437 204,930 307,395 368,874 614,790 922,185 and 1,844,370, with no remainder.
Since 1,844,370 cannot be divided by just 1 and 1,844,370, it is a composite number.