A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 933240 can be evenly divided by 1 2 3 4 5 6 7 8 10 11 12 14 15 20 21 22 24 28 30 33 35 40 42 44 55 56 60 66 70 77 84 88 101 105 110 120 132 140 154 165 168 202 210 220 231 264 280 303 308 330 385 404 420 440 462 505 606 616 660 707 770 808 840 924 1,010 1,111 1,155 1,212 1,320 1,414 1,515 1,540 1,848 2,020 2,121 2,222 2,310 2,424 2,828 3,030 3,080 3,333 3,535 4,040 4,242 4,444 4,620 5,555 5,656 6,060 6,666 7,070 7,777 8,484 8,888 9,240 10,605 11,110 12,120 13,332 14,140 15,554 16,665 16,968 21,210 22,220 23,331 26,664 28,280 31,108 33,330 38,885 42,420 44,440 46,662 62,216 66,660 77,770 84,840 93,324 116,655 133,320 155,540 186,648 233,310 311,080 466,620 and 933,240, with no remainder.
Since 933,240 cannot be divided by just 1 and 933,240, it is not a prime number.