The number 3,470,040 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 17 18 20 21 24 27 28 30 34 35 36 40 42 45 51 54 56 60 63 68 70 72 81 84 85 90 102 105 108 119 120 126 135 136 140 153 162 168 170 180 189 204 210 216 238 243 252 255 270 280 306 315 324 340 357 360 378 405 408 420 459 476 486 504 510 540 567 595 612 630 648 680 714 729 756 765 810 840 918 945 952 972 1,020 1,071 1,080 1,134 1,190 1,215 1,224 1,260 1,377 1,428 1,458 1,512 1,530 1,620 1,701 1,785 1,836 1,890 1,944 2,040 2,142 2,268 2,295 2,380 2,430 2,520 2,754 2,835 2,856 2,916 3,060 3,213 3,240 3,402 3,570 3,645 3,672 3,780 4,131 4,284 4,536 4,590 4,760 4,860 5,103 5,355 5,508 5,670 5,832 6,120 6,426 6,804 6,885 7,140 7,290 7,560 8,262 8,505 8,568 9,180 9,639 9,720 10,206 10,710 11,016 11,340 12,393 12,852 13,608 13,770 14,280 14,580 16,065 16,524 17,010 18,360 19,278 20,412 20,655 21,420 22,680 24,786 25,515 25,704 27,540 28,917 29,160 32,130 33,048 34,020 38,556 40,824 41,310 42,840 48,195 49,572 51,030 55,080 57,834 61,965 64,260 68,040 77,112 82,620 86,751 96,390 99,144 102,060 115,668 123,930 128,520 144,585 165,240 173,502 192,780 204,120 231,336 247,860 289,170 347,004 385,560 433,755 495,720 578,340 694,008 867,510 1,156,680 1,735,020 and 3,470,040, with no remainder.
Since 3,470,040 cannot be divided by just 1 and 3,470,040, it is a composite number.