23117688 has 144 divisors (see below), whose sum is σ = 73274760. Its totient is φ = 6528000.

The previous prime is 23117687. The next prime is 23117693. The reversal of 23117688 is 88671132.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23117687) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 228838 + ... + 228938.

Almost surely, 2^23117688 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 23117688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36637380).

23117688 is an abundant number, since it is smaller than the sum of its proper divisors (50157072).

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

23117688 is a wasteful number, since it uses less digits than its factorization.

23117688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 134 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 23117688 is about 4808.0856897522. The cubic root of 23117688 is about 284.8709295519.

It can be divided in two parts, 2311 and 7688, that added together give a palindrome (9999).

The spelling of 23117688 in words is "twenty-three million, one hundred seventeen thousand, six hundred eighty-eight".