23138656 has 36 divisors (see below), whose sum is σ = 48102012. Its totient is φ = 10954944.

The previous prime is 23138623. The next prime is 23138659. The reversal of 23138656 is 65683132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23138659) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10551 + ... + 12553.

It is an arithmetic number, because the mean of its divisors is an integer number (1336167).

Almost surely, 2^23138656 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 23138656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24051006).

23138656 is an abundant number, since it is smaller than the sum of its proper divisors (24963356).

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

23138656 is a wasteful number, since it uses less digits than its factorization.

23138656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2024 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 23138656 is about 4810.2656891278. The cubic root of 23138656 is about 284.9570305589.

The spelling of 23138656 in words is "twenty-three million, one hundred thirty-eight thousand, six hundred fifty-six".