90685884 has 12 divisors (see below), whose sum is σ = 211600424. Its totient is φ = 30228624.

The previous prime is 90685873. The next prime is 90685897. The reversal of 90685884 is 48858609.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×90685884² = 16447859113722912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3778567 + ... + 3778590.

Almost surely, 2^90685884 is an apocalyptic number.

It is an amenable number.

90685884 is an abundant number, since it is smaller than the sum of its proper divisors (120914540).

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

90685884 is a wasteful number, since it uses less digits than its factorization.

90685884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557164 (or 7557162 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 90685884 is about 9522.9136297669. The cubic root of 90685884 is about 449.2760111336.

The spelling of 90685884 in words is "ninety million, six hundred eighty-five thousand, eight hundred eighty-four".