A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4680396 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 27 28 36 41 42 54 63 82 84 108 123 126 151 164 189 246 252 287 302 369 378 453 492 574 604 738 756 861 906 1,057 1,107 1,148 1,359 1,476 1,722 1,812 2,114 2,214 2,583 2,718 3,171 3,444 4,077 4,228 4,428 5,166 5,436 6,191 6,342 7,749 8,154 9,513 10,332 12,382 12,684 15,498 16,308 18,573 19,026 24,764 28,539 30,996 37,146 38,052 43,337 55,719 57,078 74,292 86,674 111,438 114,156 130,011 167,157 173,348 222,876 260,022 334,314 390,033 520,044 668,628 780,066 1,170,099 1,560,132 2,340,198 and 4,680,396, with no remainder.
Since 4,680,396 cannot be divided by just 1 and 4,680,396, it is not a prime number.