The number 2,308,500 can be evenly divided by 1 2 3 4 5 6 9 10 12 15 18 19 20 25 27 30 36 38 45 50 54 57 60 75 76 81 90 95 100 108 114 125 135 150 162 171 180 190 225 228 243 250 270 285 300 324 342 375 380 405 450 475 486 500 513 540 570 675 684 750 810 855 900 950 972 1,026 1,125 1,140 1,215 1,350 1,425 1,500 1,539 1,620 1,710 1,900 2,025 2,052 2,250 2,375 2,430 2,565 2,700 2,850 3,078 3,375 3,420 4,050 4,275 4,500 4,617 4,750 4,860 5,130 5,700 6,075 6,156 6,750 7,125 7,695 8,100 8,550 9,234 9,500 10,125 10,260 12,150 12,825 13,500 14,250 15,390 17,100 18,468 20,250 21,375 23,085 24,300 25,650 28,500 30,375 30,780 38,475 40,500 42,750 46,170 51,300 60,750 64,125 76,950 85,500 92,340 115,425 121,500 128,250 153,900 192,375 230,850 256,500 384,750 461,700 577,125 769,500 1,154,250 and 2,308,500, with no remainder.
Since 2,308,500 cannot be divided by just 1 and 2,308,500, it is a composite number.