A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3682710 can be evenly divided by 1 2 3 5 6 9 10 15 17 18 29 30 34 45 51 58 83 85 87 90 102 145 153 166 170 174 249 255 261 290 306 415 435 493 498 510 522 747 765 830 870 986 1,245 1,305 1,411 1,479 1,494 1,530 2,407 2,465 2,490 2,610 2,822 2,958 3,735 4,233 4,437 4,814 4,930 7,055 7,221 7,395 7,470 8,466 8,874 12,035 12,699 14,110 14,442 14,790 21,165 21,663 22,185 24,070 25,398 36,105 40,919 42,330 43,326 44,370 63,495 72,210 81,838 108,315 122,757 126,990 204,595 216,630 245,514 368,271 409,190 613,785 736,542 1,227,570 1,841,355 and 3,682,710, with no remainder.
Since 3,682,710 cannot be divided by just 1 and 3,682,710, it is not a prime number.