90685944 has 24 divisors (see below), whose sum is σ = 245607960. Its totient is φ = 30228624.

The previous prime is 90685937. The next prime is 90685961. The reversal of 90685944 is 44958609.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×90685944² = 16447880878342272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90685944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 629692 + ... + 629835.

It is an arithmetic number, because the mean of its divisors is an integer number (10233665).

Almost surely, 2^90685944 is an apocalyptic number.

It is an amenable number.

90685944 is an abundant number, since it is smaller than the sum of its proper divisors (154922016).

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

90685944 is a wasteful number, since it uses less digits than its factorization.

90685944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259539 (or 1259532 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 90685944 is about 9522.9167800627. The cubic root of 90685944 is about 449.2761102176.

The spelling of 90685944 in words is "ninety million, six hundred eighty-five thousand, nine hundred forty-four".