800805856 has 24 divisors (see below), whose sum is σ = 1613254104. Its totient is φ = 391090560.

The previous prime is 800805853. The next prime is 800805917. The reversal of 800805856 is 658508008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800805851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289615 + ... + 292366.

It is an arithmetic number, because the mean of its divisors is an integer number (67218921).

Almost surely, 2^800805856 is an apocalyptic number.

800805856 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

800805856 is an abundant number, since it is smaller than the sum of its proper divisors (812448248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

800805856 is a wasteful number, since it uses less digits than its factorization.

800805856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582034 (or 582026 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 40.

The square root of 800805856 is about 28298.5133178406. The cubic root of 800805856 is about 928.6293664700.

The spelling of 800805856 in words is "eight hundred million, eight hundred five thousand, eight hundred fifty-six".