The number 235,620 can be evenly divided by 1 2 3 4 5 6 7 9 10 11 12 14 15 17 18 20 21 22 28 30 33 34 35 36 42 44 45 51 55 60 63 66 68 70 77 84 85 90 99 102 105 110 119 126 132 140 153 154 165 170 180 187 198 204 210 220 231 238 252 255 306 308 315 330 340 357 374 385 396 420 462 476 495 510 561 595 612 630 660 693 714 748 765 770 924 935 990 1,020 1,071 1,122 1,155 1,190 1,260 1,309 1,386 1,428 1,530 1,540 1,683 1,785 1,870 1,980 2,142 2,244 2,310 2,380 2,618 2,772 2,805 3,060 3,366 3,465 3,570 3,740 3,927 4,284 4,620 5,236 5,355 5,610 6,545 6,732 6,930 7,140 7,854 8,415 10,710 11,220 11,781 13,090 13,860 15,708 16,830 19,635 21,420 23,562 26,180 33,660 39,270 47,124 58,905 78,540 117,810 and 235,620, with no remainder.
Since 235,620 cannot be divided by just 1 and 235,620, it is a composite number.