A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 9624000 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 48 50 60 64 75 80 96 100 120 125 150 160 192 200 240 250 300 320 375 400 401 480 500 600 750 800 802 960 1,000 1,200 1,203 1,500 1,600 1,604 2,000 2,005 2,400 2,406 3,000 3,208 4,000 4,010 4,800 4,812 6,000 6,015 6,416 8,000 8,020 9,624 10,025 12,000 12,030 12,832 16,040 19,248 20,050 24,000 24,060 25,664 30,075 32,080 38,496 40,100 48,120 50,125 60,150 64,160 76,992 80,200 96,240 100,250 120,300 128,320 150,375 160,400 192,480 200,500 240,600 300,750 320,800 384,960 401,000 481,200 601,500 641,600 802,000 962,400 1,203,000 1,604,000 1,924,800 2,406,000 3,208,000 4,812,000 and 9,624,000, with no remainder.
Since 9,624,000 cannot be divided by just 1 and 9,624,000, it is not a prime number.