A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3024360 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 31 36 40 45 60 62 72 90 93 120 124 155 180 186 248 271 279 310 360 372 465 542 558 620 744 813 930 1,084 1,116 1,240 1,355 1,395 1,626 1,860 2,168 2,232 2,439 2,710 2,790 3,252 3,720 4,065 4,878 5,420 5,580 6,504 8,130 8,401 9,756 10,840 11,160 12,195 16,260 16,802 19,512 24,390 25,203 32,520 33,604 42,005 48,780 50,406 67,208 75,609 84,010 97,560 100,812 126,015 151,218 168,020 201,624 252,030 302,436 336,040 378,045 504,060 604,872 756,090 1,008,120 1,512,180 and 3,024,360, with no remainder.
Since 3,024,360 cannot be divided by just 1 and 3,024,360, it is not a prime number.