A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2382432 can be evenly divided by 1 2 3 4 6 8 12 13 16 23 24 26 32 39 46 48 52 69 78 83 92 96 104 138 156 166 184 208 249 276 299 312 332 368 416 498 552 598 624 664 736 897 996 1,079 1,104 1,196 1,248 1,328 1,794 1,909 1,992 2,158 2,208 2,392 2,656 3,237 3,588 3,818 3,984 4,316 4,784 5,727 6,474 7,176 7,636 7,968 8,632 9,568 11,454 12,948 14,352 15,272 17,264 22,908 24,817 25,896 28,704 30,544 34,528 45,816 49,634 51,792 61,088 74,451 91,632 99,268 103,584 148,902 183,264 198,536 297,804 397,072 595,608 794,144 1,191,216 and 2,382,432, with no remainder.
Since 2,382,432 cannot be divided by just 1 and 2,382,432, it is not a prime number.