A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2089360 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 20 26 28 35 40 41 49 52 56 65 70 80 82 91 98 104 112 130 140 164 182 196 205 208 245 260 280 287 328 364 392 410 455 490 520 533 560 574 637 656 728 784 820 910 980 1,040 1,066 1,148 1,274 1,435 1,456 1,640 1,820 1,960 2,009 2,132 2,296 2,548 2,665 2,870 3,185 3,280 3,640 3,731 3,920 4,018 4,264 4,592 5,096 5,330 5,740 6,370 7,280 7,462 8,036 8,528 10,045 10,192 10,660 11,480 12,740 14,924 16,072 18,655 20,090 21,320 22,960 25,480 26,117 29,848 32,144 37,310 40,180 42,640 50,960 52,234 59,696 74,620 80,360 104,468 130,585 149,240 160,720 208,936 261,170 298,480 417,872 522,340 1,044,680 and 2,089,360, with no remainder.
Since 2,089,360 cannot be divided by just 1 and 2,089,360, it is not a prime number.