A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5448600 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 27 30 36 40 45 50 54 60 72 75 90 100 108 120 135 150 180 200 216 225 270 300 360 450 540 600 675 900 1,009 1,080 1,350 1,800 2,018 2,700 3,027 4,036 5,045 5,400 6,054 8,072 9,081 10,090 12,108 15,135 18,162 20,180 24,216 25,225 27,243 30,270 36,324 40,360 45,405 50,450 54,486 60,540 72,648 75,675 90,810 100,900 108,972 121,080 136,215 151,350 181,620 201,800 217,944 227,025 272,430 302,700 363,240 454,050 544,860 605,400 681,075 908,100 1,089,720 1,362,150 1,816,200 2,724,300 and 5,448,600, with no remainder.
Since 5,448,600 cannot be divided by just 1 and 5,448,600, it is not a prime number.