90806904 has 48 divisors (see below), whose sum is σ = 246542400. Its totient is φ = 30194304.

The previous prime is 90806887. The next prime is 90806957. The reversal of 90806904 is 40960809.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33172 + ... + 35804.

It is an arithmetic number, because the mean of its divisors is an integer number (5136300).

Almost surely, 2^90806904 is an apocalyptic number.

It is an amenable number.

90806904 is an abundant number, since it is smaller than the sum of its proper divisors (155735496).

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

90806904 is a wasteful number, since it uses less digits than its factorization.

90806904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124 (or 3117 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 90806904 is about 9529.2656590107. The cubic root of 90806904 is about 449.4757747287.

The spelling of 90806904 in words is "ninety million, eight hundred six thousand, nine hundred four".