The number 6,070,428 can be evenly divided by 1 2 3 4 6 7 9 12 13 14 17 18 21 26 28 34 36 39 42 51 52 63 68 78 84 91 102 109 117 119 126 153 156 182 204 218 221 234 238 252 273 306 327 357 364 436 442 468 476 546 612 654 663 714 763 819 884 981 1,071 1,092 1,308 1,326 1,417 1,428 1,526 1,547 1,638 1,853 1,962 1,989 2,142 2,289 2,652 2,834 3,052 3,094 3,276 3,706 3,924 3,978 4,251 4,284 4,578 4,641 5,559 5,668 6,188 6,867 7,412 7,956 8,502 9,156 9,282 9,919 11,118 12,753 12,971 13,734 13,923 16,677 17,004 18,564 19,838 22,236 24,089 25,506 25,942 27,468 27,846 29,757 33,354 38,913 39,676 48,178 51,012 51,884 55,692 59,514 66,708 72,267 77,826 89,271 96,356 116,739 119,028 144,534 155,652 168,623 178,542 216,801 233,478 289,068 337,246 357,084 433,602 466,956 505,869 674,492 867,204 1,011,738 1,517,607 2,023,476 3,035,214 and 6,070,428, with no remainder.
Since 6,070,428 cannot be divided by just 1 and 6,070,428, it is a composite number.