The number 3,335,400 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 25 30 34 36 40 45 50 51 60 68 72 75 85 90 100 102 109 120 136 150 153 170 180 200 204 218 225 255 300 306 327 340 360 408 425 436 450 510 545 600 612 654 680 765 850 872 900 981 1,020 1,090 1,224 1,275 1,308 1,530 1,635 1,700 1,800 1,853 1,962 2,040 2,180 2,550 2,616 2,725 3,060 3,270 3,400 3,706 3,825 3,924 4,360 4,905 5,100 5,450 5,559 6,120 6,540 7,412 7,650 7,848 8,175 9,265 9,810 10,200 10,900 11,118 13,080 14,824 15,300 16,350 16,677 18,530 19,620 21,800 22,236 24,525 27,795 30,600 32,700 33,354 37,060 39,240 44,472 46,325 49,050 55,590 65,400 66,708 74,120 83,385 92,650 98,100 111,180 133,416 138,975 166,770 185,300 196,200 222,360 277,950 333,540 370,600 416,925 555,900 667,080 833,850 1,111,800 1,667,700 and 3,335,400, with no remainder.
Since 3,335,400 cannot be divided by just 1 and 3,335,400, it is a composite number.