86381864 has 16 divisors (see below), whose sum is σ = 165412800. Its totient is φ = 42271792.

The previous prime is 86381863. The next prime is 86381873. The reversal of 86381864 is 46818368.

It is a super-2 number, since 2×86381864² = 14923652856228992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86381861) 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, 114494 + ... + 115245.

It is an arithmetic number, because the mean of its divisors is an integer number (10338300).

Almost surely, 2^86381864 is an apocalyptic number.

It is an amenable number.

86381864 is a deficient number, since it is larger than the sum of its proper divisors (79030936).

86381864 is a wasteful number, since it uses less digits than its factorization.

86381864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229792 (or 229788 counting only the distinct ones).

The product of its digits is 221184, while the sum is 44.

The square root of 86381864 is about 9294.1844182263. The cubic root of 86381864 is about 442.0528454523.

The spelling of 86381864 in words is "eighty-six million, three hundred eighty-one thousand, eight hundred sixty-four".