A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 949440 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 23 24 30 32 40 43 46 48 60 64 69 80 86 92 96 115 120 129 138 160 172 184 192 215 230 240 258 276 320 344 345 368 430 460 480 516 552 645 688 690 736 860 920 960 989 1,032 1,104 1,290 1,376 1,380 1,472 1,720 1,840 1,978 2,064 2,208 2,580 2,752 2,760 2,967 3,440 3,680 3,956 4,128 4,416 4,945 5,160 5,520 5,934 6,880 7,360 7,912 8,256 9,890 10,320 11,040 11,868 13,760 14,835 15,824 19,780 20,640 22,080 23,736 29,670 31,648 39,560 41,280 47,472 59,340 63,296 79,120 94,944 118,680 158,240 189,888 237,360 316,480 474,720 and 949,440, with no remainder.
Since 949,440 cannot be divided by just 1 and 949,440, it is not a prime number.