A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4869228 can be evenly divided by 1 2 3 4 6 7 12 13 14 21 26 28 39 42 49 52 78 84 91 98 147 156 169 182 196 273 294 338 343 364 507 546 588 637 676 686 1,014 1,029 1,092 1,183 1,274 1,372 1,911 2,028 2,058 2,366 2,401 2,548 3,549 3,822 4,116 4,459 4,732 4,802 7,098 7,203 7,644 8,281 8,918 9,604 13,377 14,196 14,406 16,562 17,836 24,843 26,754 28,812 31,213 33,124 49,686 53,508 57,967 62,426 93,639 99,372 115,934 124,852 173,901 187,278 231,868 347,802 374,556 405,769 695,604 811,538 1,217,307 1,623,076 2,434,614 and 4,869,228, with no remainder.
Since 4,869,228 cannot be divided by just 1 and 4,869,228, it is not a prime number.