90111112 has 64 divisors (see below), whose sum is σ = 213091200. Its totient is φ = 34767360.

The previous prime is 90111107. The next prime is 90111143. The reversal of 90111112 is 21111109.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28339 + ... + 31357.

It is an arithmetic number, because the mean of its divisors is an integer number (3329550).

Almost surely, 2^90111112 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 90111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106545600).

90111112 is an abundant number, since it is smaller than the sum of its proper divisors (122980088).

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

90111112 is a wasteful number, since it uses less digits than its factorization.

90111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086 (or 3082 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 90111112 is about 9492.6872907518. The cubic root of 90111112 is about 448.3248202373.

The spelling of 90111112 in words is "ninety million, one hundred eleven thousand, one hundred twelve".