86815044 has 48 divisors (see below), whose sum is σ = 225603840. Its totient is φ = 28870560.

The previous prime is 86815013. The next prime is 86815103. The reversal of 86815044 is 44051868.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 15 ways as a sum of consecutive naturals, for example, 69909 + ... + 71139.

It is an arithmetic number, because the mean of its divisors is an integer number (4700080).

Almost surely, 2^86815044 is an apocalyptic number.

It is an amenable number.

86815044 is an abundant number, since it is smaller than the sum of its proper divisors (138788796).

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

86815044 is a wasteful number, since it uses less digits than its factorization.

86815044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 86815044 is about 9317.4590956977. The cubic root of 86815044 is about 442.7905360012.

The spelling of 86815044 in words is "eighty-six million, eight hundred fifteen thousand, forty-four".