90023128 has 32 divisors (see below), whose sum is σ = 183985200. Its totient is φ = 41044608.

The previous prime is 90023117. The next prime is 90023191. The reversal of 90023128 is 82132009.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3418 + ... + 13846.

Almost surely, 2^90023128 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 90023128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91992600).

90023128 is an abundant number, since it is smaller than the sum of its proper divisors (93962072).

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

90023128 is a wasteful number, since it uses less digits than its factorization.

90023128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531 (or 10527 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 90023128 is about 9488.0518548330. The cubic root of 90023128 is about 448.1788587491.

The spelling of 90023128 in words is "ninety million, twenty-three thousand, one hundred twenty-eight".