A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 896760 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 47 53 60 72 90 94 106 120 141 159 180 188 212 235 265 282 318 360 376 423 424 470 477 530 564 636 705 795 846 940 954 1,060 1,128 1,272 1,410 1,590 1,692 1,880 1,908 2,115 2,120 2,385 2,491 2,820 3,180 3,384 3,816 4,230 4,770 4,982 5,640 6,360 7,473 8,460 9,540 9,964 12,455 14,946 16,920 19,080 19,928 22,419 24,910 29,892 37,365 44,838 49,820 59,784 74,730 89,676 99,640 112,095 149,460 179,352 224,190 298,920 448,380 and 896,760, with no remainder.
Since 896,760 cannot be divided by just 1 and 896,760, it is not a prime number.