A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3528360 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 27 30 33 36 40 44 45 54 55 60 66 72 81 88 90 99 108 110 120 121 132 135 162 165 180 198 216 220 242 243 264 270 297 324 330 360 363 396 405 440 484 486 495 540 594 605 648 660 726 729 792 810 891 968 972 990 1,080 1,089 1,188 1,210 1,215 1,320 1,452 1,458 1,485 1,620 1,782 1,815 1,944 1,980 2,178 2,376 2,420 2,430 2,673 2,904 2,916 2,970 3,240 3,267 3,564 3,630 3,645 3,960 4,356 4,455 4,840 4,860 5,346 5,445 5,832 5,940 6,534 7,128 7,260 7,290 8,019 8,712 8,910 9,720 9,801 10,692 10,890 11,880 13,068 13,365 14,520 14,580 16,038 16,335 17,820 19,602 21,384 21,780 26,136 26,730 29,160 29,403 32,076 32,670 35,640 39,204 40,095 43,560 49,005 53,460 58,806 64,152 65,340 78,408 80,190 88,209 98,010 106,920 117,612 130,680 147,015 160,380 176,418 196,020 235,224 294,030 320,760 352,836 392,040 441,045 588,060 705,672 882,090 1,176,120 1,764,180 and 3,528,360, with no remainder.
Since 3,528,360 cannot be divided by just 1 and 3,528,360, it is not a prime number.