90311232 has 112 divisors (see below), whose sum is σ = 265322304. Its totient is φ = 26880000.

The previous prime is 90311231. The next prime is 90311303. The reversal of 90311232 is 23211309.

It is a happy number.

It is a super-2 number, since 2×90311232² = 16312237250715648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90311199 and 90311208.

It is not an unprimeable number, because it can be changed into a prime (90311231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128482 + ... + 129182.

Almost surely, 2^90311232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132661152).

90311232 is an abundant number, since it is smaller than the sum of its proper divisors (175011072).

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

90311232 is a wasteful number, since it uses less digits than its factorization.

90311232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 778 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 90311232 is about 9503.2221903942. Note that the first 3 decimals coincide. The cubic root of 90311232 is about 448.6564568381.

The spelling of 90311232 in words is "ninety million, three hundred eleven thousand, two hundred thirty-two".