870 is.
870
35% of 870= 35% * 870= 0.35 * 870= 304.5
15% of 870 = 15% * 870 = 0.15 * 870 = 130.5
19% of 870 = 19% * 870 = 0.19 * 870 = 165.3
I paced it out yesterday - 870 paces. So reckon it is not far short of half a mile.
All multiples of 870 are divisible by 870.
870
2 is not divisible by 870. 870 is divisible by 2.
870 = DCCCLXX
29 x 30 = 870
4 is not divisible by 870.