23265990 has 96 divisors (see below), whose sum is σ = 67122432. Its totient is φ = 5544000.

The previous prime is 23265989. The next prime is 23266021. The reversal of 23265990 is 9956232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70125 + ... + 70455.

It is an arithmetic number, because the mean of its divisors is an integer number (699192).

Almost surely, 2^23265990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23265990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33561216).

23265990 is an abundant number, since it is smaller than the sum of its proper divisors (43856442).

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

23265990 is a wasteful number, since it uses less digits than its factorization.

23265990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 23265990 is about 4823.4831812706. The cubic root of 23265990 is about 285.4787889239.

The spelling of 23265990 in words is "twenty-three million, two hundred sixty-five thousand, nine hundred ninety".