86505864 has 32 divisors (see below), whose sum is σ = 218700000. Its totient is φ = 28510592.

The previous prime is 86505847. The next prime is 86505871. The reversal of 86505864 is 46850568.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18114 + ... + 22385.

It is an arithmetic number, because the mean of its divisors is an integer number (6834375).

Almost surely, 2^86505864 is an apocalyptic number.

It is an amenable number.

86505864 is an abundant number, since it is smaller than the sum of its proper divisors (132194136).

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

86505864 is a wasteful number, since it uses less digits than its factorization.

86505864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40597 (or 40593 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 86505864 is about 9300.8528641195. The cubic root of 86505864 is about 442.2642646194.

The spelling of 86505864 in words is "eighty-six million, five hundred five thousand, eight hundred sixty-four".