90031122 has 16 divisors (see below), whose sum is σ = 200069280. Its totient is φ = 30010356.

The previous prime is 90031087. The next prime is 90031129. The reversal of 90031122 is 22113009.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 90031095 and 90031104.

It is not an unprimeable number, because it can be changed into a prime (90031129) 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, 833568 + ... + 833675.

It is an arithmetic number, because the mean of its divisors is an integer number (12504330).

Almost surely, 2^90031122 is an apocalyptic number.

90031122 is an abundant number, since it is smaller than the sum of its proper divisors (110038158).

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

90031122 is a wasteful number, since it uses less digits than its factorization.

90031122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667254 (or 1667248 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 90031122 is about 9488.4731121503. The cubic root of 90031122 is about 448.1921243614.

The spelling of 90031122 in words is "ninety million, thirty-one thousand, one hundred twenty-two".