The number 5,600,320 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 32 37 40 43 44 55 64 74 80 86 88 110 148 160 172 176 185 215 220 296 320 344 352 370 407 430 440 473 592 688 704 740 814 860 880 946 1,184 1,376 1,480 1,591 1,628 1,720 1,760 1,892 2,035 2,365 2,368 2,752 2,960 3,182 3,256 3,440 3,520 3,784 4,070 4,730 5,920 6,364 6,512 6,880 7,568 7,955 8,140 9,460 11,840 12,728 13,024 13,760 15,136 15,910 16,280 17,501 18,920 25,456 26,048 30,272 31,820 32,560 35,002 37,840 50,912 63,640 65,120 70,004 75,680 87,505 101,824 127,280 130,240 140,008 151,360 175,010 254,560 280,016 350,020 509,120 560,032 700,040 1,120,064 1,400,080 2,800,160 and 5,600,320, with no remainder.
Since 5,600,320 cannot be divided by just 1 and 5,600,320, it is a composite number.