The number 4,473,000 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 25 28 30 35 36 40 42 45 50 56 60 63 70 71 72 75 84 90 100 105 120 125 126 140 142 150 168 175 180 200 210 213 225 250 252 280 284 300 315 350 355 360 375 420 426 450 497 500 504 525 568 600 630 639 700 710 750 840 852 875 900 994 1,000 1,050 1,065 1,125 1,260 1,278 1,400 1,420 1,491 1,500 1,575 1,704 1,750 1,775 1,800 1,988 2,100 2,130 2,250 2,485 2,520 2,556 2,625 2,840 2,982 3,000 3,150 3,195 3,500 3,550 3,976 4,200 4,260 4,473 4,500 4,970 5,112 5,250 5,325 5,964 6,300 6,390 7,000 7,100 7,455 7,875 8,520 8,875 8,946 9,000 9,940 10,500 10,650 11,928 12,425 12,600 12,780 14,200 14,910 15,750 15,975 17,750 17,892 19,880 21,000 21,300 22,365 24,850 25,560 26,625 29,820 31,500 31,950 35,500 35,784 37,275 42,600 44,730 49,700 53,250 59,640 62,125 63,000 63,900 71,000 74,550 79,875 89,460 99,400 106,500 111,825 124,250 127,800 149,100 159,750 178,920 186,375 213,000 223,650 248,500 298,200 319,500 372,750 447,300 497,000 559,125 639,000 745,500 894,600 1,118,250 1,491,000 2,236,500 and 4,473,000, with no remainder.
Since 4,473,000 cannot be divided by just 1 and 4,473,000, it is a composite number.