The number 2,723,400 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 89 90 100 102 120 136 150 153 170 178 180 200 204 225 255 267 300 306 340 356 360 408 425 445 450 510 534 600 612 680 712 765 801 850 890 900 1,020 1,068 1,224 1,275 1,335 1,513 1,530 1,602 1,700 1,780 1,800 2,040 2,136 2,225 2,550 2,670 3,026 3,060 3,204 3,400 3,560 3,825 4,005 4,450 4,539 5,100 5,340 6,052 6,120 6,408 6,675 7,565 7,650 8,010 8,900 9,078 10,200 10,680 12,104 13,350 13,617 15,130 15,300 16,020 17,800 18,156 20,025 22,695 26,700 27,234 30,260 30,600 32,040 36,312 37,825 40,050 45,390 53,400 54,468 60,520 68,085 75,650 80,100 90,780 108,936 113,475 136,170 151,300 160,200 181,560 226,950 272,340 302,600 340,425 453,900 544,680 680,850 907,800 1,361,700 and 2,723,400, with no remainder.
Since 2,723,400 cannot be divided by just 1 and 2,723,400, it is a composite number.