90031086 has 24 divisors (see below), whose sum is σ = 197539680. Its totient is φ = 29630016.

The previous prime is 90031043. The next prime is 90031087. The reversal of 90031086 is 68013009.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90031087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30235 + ... + 33078.

It is an arithmetic number, because the mean of its divisors is an integer number (8230820).

Almost surely, 2^90031086 is an apocalyptic number.

90031086 is an abundant number, since it is smaller than the sum of its proper divisors (107508594).

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

90031086 is a wasteful number, since it uses less digits than its factorization.

90031086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63400 (or 63397 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 90031086 is about 9488.4712151115. The cubic root of 90031086 is about 448.1920646231.

The spelling of 90031086 in words is "ninety million, thirty-one thousand, eighty-six".