90909112 has 48 divisors (see below), whose sum is σ = 204707520. Its totient is φ = 37699200.

The previous prime is 90909109. The next prime is 90909121. The reversal of 90909112 is 21190909.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8412 + ... + 15892.

It is an arithmetic number, because the mean of its divisors is an integer number (4264740).

Almost surely, 2^90909112 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 90909112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102353760).

90909112 is an abundant number, since it is smaller than the sum of its proper divisors (113798408).

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

90909112 is a wasteful number, since it uses less digits than its factorization.

90909112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532 (or 7521 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 90909112 is about 9534.6269984725. The cubic root of 90909112 is about 449.6443477951.

The spelling of 90909112 in words is "ninety million, nine hundred nine thousand, one hundred twelve".