86817856 has 28 divisors (see below), whose sum is σ = 177840640. Its totient is φ = 42007680.

The previous prime is 86817839. The next prime is 86817881. The reversal of 86817856 is 65871868.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19896 + ... + 23863.

Almost surely, 2^86817856 is an apocalyptic number.

It is an amenable number.

86817856 is an abundant number, since it is smaller than the sum of its proper divisors (91022784).

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

86817856 is a wasteful number, since it uses less digits than its factorization.

86817856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43802 (or 43792 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 86817856 is about 9317.6099939845. The cubic root of 86817856 is about 442.7953167146.

The spelling of 86817856 in words is "eighty-six million, eight hundred seventeen thousand, eight hundred fifty-six".