It is a zygodrome in base 15.
It is a congruent number.
It is an unprimeable number.
2856800 is an apocalyptic number.
856800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 856800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828008).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
856800 is a wasteful number, since it uses less digits than its factorization.
856800 is an evil number, because the sum of its binary digits is even.
The square root of 856800 is about 925.6349172325. The cubic root of 856800 is about 94.9787579468.
The spelling of 856800 in words is "eight hundred fifty-six thousand, eight hundred".