23115856 has 20 divisors (see below), whose sum is σ = 47144800. Its totient is φ = 10949472.

The previous prime is 23115853. The next prime is 23115877. The reversal of 23115856 is 65851132.

It is a super-2 number, since 2×23115856² = 1068685597225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37716 + ... + 38323.

It is an arithmetic number, because the mean of its divisors is an integer number (2357240).

Almost surely, 2^23115856 is an apocalyptic number.

It is an amenable number.

23115856 is an abundant number, since it is smaller than the sum of its proper divisors (24028944).

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

23115856 is a wasteful number, since it uses less digits than its factorization.

23115856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76066 (or 76060 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 23115856 is about 4807.8951735661. The cubic root of 23115856 is about 284.8634043280.

Adding to 23115856 its reverse (65851132), we get a palindrome (88966988).

The spelling of 23115856 in words is "twenty-three million, one hundred fifteen thousand, eight hundred fifty-six".