A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5968440 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 59 60 72 90 118 120 177 180 236 281 295 354 360 472 531 562 590 708 843 885 1,062 1,124 1,180 1,405 1,416 1,686 1,770 2,124 2,248 2,360 2,529 2,655 2,810 3,372 3,540 4,215 4,248 5,058 5,310 5,620 6,744 7,080 8,430 10,116 10,620 11,240 12,645 16,579 16,860 20,232 21,240 25,290 33,158 33,720 49,737 50,580 66,316 82,895 99,474 101,160 132,632 149,211 165,790 198,948 248,685 298,422 331,580 397,896 497,370 596,844 663,160 746,055 994,740 1,193,688 1,492,110 1,989,480 2,984,220 and 5,968,440, with no remainder.
Since 5,968,440 cannot be divided by just 1 and 5,968,440, it is not a prime number.