A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4940000 can be evenly divided by 1 2 4 5 8 10 13 16 19 20 25 26 32 38 40 50 52 65 76 80 95 100 104 125 130 152 160 190 200 208 247 250 260 304 325 380 400 416 475 494 500 520 608 625 650 760 800 950 988 1,000 1,040 1,235 1,250 1,300 1,520 1,625 1,900 1,976 2,000 2,080 2,375 2,470 2,500 2,600 3,040 3,250 3,800 3,952 4,000 4,750 4,940 5,000 5,200 6,175 6,500 7,600 7,904 8,125 9,500 9,880 10,000 10,400 11,875 12,350 13,000 15,200 16,250 19,000 19,760 20,000 23,750 24,700 26,000 30,875 32,500 38,000 39,520 47,500 49,400 52,000 61,750 65,000 76,000 95,000 98,800 123,500 130,000 154,375 190,000 197,600 247,000 260,000 308,750 380,000 494,000 617,500 988,000 1,235,000 2,470,000 and 4,940,000, with no remainder.
Since 4,940,000 cannot be divided by just 1 and 4,940,000, it is not a prime number.