A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9238200 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 50 60 75 89 100 120 150 173 178 200 267 300 346 356 445 519 534 600 692 712 865 890 1,038 1,068 1,335 1,384 1,730 1,780 2,076 2,136 2,225 2,595 2,670 3,460 3,560 4,152 4,325 4,450 5,190 5,340 6,675 6,920 8,650 8,900 10,380 10,680 12,975 13,350 15,397 17,300 17,800 20,760 25,950 26,700 30,794 34,600 46,191 51,900 53,400 61,588 76,985 92,382 103,800 123,176 153,970 184,764 230,955 307,940 369,528 384,925 461,910 615,880 769,850 923,820 1,154,775 1,539,700 1,847,640 2,309,550 3,079,400 4,619,100 and 9,238,200, with no remainder.
Since 9,238,200 cannot be divided by just 1 and 9,238,200, it is not a prime number.