86731904 has 32 divisors (see below), whose sum is σ = 197472000. Its totient is φ = 37170432.

The previous prime is 86731891. The next prime is 86731921. The reversal of 86731904 is 40913768.

It is a tau number, because it is divible by the number of its divisors (32).

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, 47504 + ... + 49295.

It is an arithmetic number, because the mean of its divisors is an integer number (6171000).

Almost surely, 2^86731904 is an apocalyptic number.

It is an amenable number.

86731904 is an abundant number, since it is smaller than the sum of its proper divisors (110740096).

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

86731904 is an equidigital number, since it uses as much as digits as its factorization.

86731904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96820 (or 96808 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 86731904 is about 9312.9965102538. The cubic root of 86731904 is about 442.6491420620.

The spelling of 86731904 in words is "eighty-six million, seven hundred thirty-one thousand, nine hundred four".