90531132 has 24 divisors (see below), whose sum is σ = 212411472. Its totient is φ = 30009600.

The previous prime is 90531113. The next prime is 90531139. The reversal of 90531132 is 23113509.

It is a happy number.

It is a super-2 number, since 2×90531132² = 16391771722402848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90531139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18669 + ... + 23012.

It is an arithmetic number, because the mean of its divisors is an integer number (8850478).

Almost surely, 2^90531132 is an apocalyptic number.

It is an amenable number.

90531132 is an abundant number, since it is smaller than the sum of its proper divisors (121880340).

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

90531132 is a wasteful number, since it uses less digits than its factorization.

90531132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41869 (or 41867 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 90531132 is about 9514.7849161187. The cubic root of 90531132 is about 449.0203081738.

The spelling of 90531132 in words is "ninety million, five hundred thirty-one thousand, one hundred thirty-two".