86807904 has 48 divisors (see below), whose sum is σ = 235735920. Its totient is φ = 27937280.

The previous prime is 86807891. The next prime is 86807909. The reversal of 86807904 is 40970868.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×86807904² = 15071224393746432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86807909) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12807 + ... + 18374.

It is an arithmetic number, because the mean of its divisors is an integer number (4911165).

Almost surely, 2^86807904 is an apocalyptic number.

It is an amenable number.

86807904 is an abundant number, since it is smaller than the sum of its proper divisors (148928016).

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

86807904 is a wasteful number, since it uses less digits than its factorization.

86807904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31223 (or 31215 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 86807904 is about 9317.0759361508. The cubic root of 86807904 is about 442.7783967415.

The spelling of 86807904 in words is "eighty-six million, eight hundred seven thousand, nine hundred four".