23115728 has 40 divisors (see below), whose sum is σ = 46604160. Its totient is φ = 11098880.

The previous prime is 23115721. The next prime is 23115731. The reversal of 23115728 is 82751132.

It is a self number, because there is not a number n which added to its sum of digits gives 23115728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115721) 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, 44108 + ... + 44628.

It is an arithmetic number, because the mean of its divisors is an integer number (1165104).

Almost surely, 2^23115728 is an apocalyptic number.

It is an amenable number.

23115728 is an abundant number, since it is smaller than the sum of its proper divisors (23488432).

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

23115728 is a wasteful number, since it uses less digits than its factorization.

23115728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 629 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 23115728 is about 4807.8818621093. The cubic root of 23115728 is about 284.8628785334.

The spelling of 23115728 in words is "twenty-three million, one hundred fifteen thousand, seven hundred twenty-eight".