The number 3,104,400 can be evenly divided by 1 2 3 4 5 6 8 10 12 13 15 16 20 24 25 26 30 39 40 48 50 52 60 65 75 78 80 100 104 120 130 150 156 195 199 200 208 240 260 300 312 325 390 398 400 520 597 600 624 650 780 796 975 995 1,040 1,194 1,200 1,300 1,560 1,592 1,950 1,990 2,388 2,587 2,600 2,985 3,120 3,184 3,900 3,980 4,776 4,975 5,174 5,200 5,970 7,761 7,800 7,960 9,552 9,950 10,348 11,940 12,935 14,925 15,522 15,600 15,920 19,900 20,696 23,880 25,870 29,850 31,044 38,805 39,800 41,392 47,760 51,740 59,700 62,088 64,675 77,610 79,600 103,480 119,400 124,176 129,350 155,220 194,025 206,960 238,800 258,700 310,440 388,050 517,400 620,880 776,100 1,034,800 1,552,200 and 3,104,400, with no remainder.
Since 3,104,400 cannot be divided by just 1 and 3,104,400, it is a composite number.