86840864 has 24 divisors (see below), whose sum is σ = 186511248. Its totient is φ = 39472960.

The previous prime is 86840857. The next prime is 86840869. The reversal of 86840864 is 46804868.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (86840869) 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, 123002 + ... + 123705.

It is an arithmetic number, because the mean of its divisors is an integer number (7771302).

Almost surely, 2^86840864 is an apocalyptic number.

It is an amenable number.

86840864 is an abundant number, since it is smaller than the sum of its proper divisors (99670384).

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

86840864 is a wasteful number, since it uses less digits than its factorization.

86840864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246728 (or 246720 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 86840864 is about 9318.8445635712. The cubic root of 86840864 is about 442.8344290020.

The spelling of 86840864 in words is "eighty-six million, eight hundred forty thousand, eight hundred sixty-four".