23239872 has 70 divisors (see below), whose sum is σ = 68905628. Its totient is φ = 7744896.

The previous prime is 23239861. The next prime is 23239873. The reversal of 23239872 is 27893232.

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

It is not an unprimeable number, because it can be changed into a prime (23239873) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2943 + ... + 7425.

Almost surely, 2^23239872 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 23239872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34452814).

23239872 is an abundant number, since it is smaller than the sum of its proper divisors (45665756).

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

23239872 is an equidigital number, since it uses as much as digits as its factorization.

23239872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4507 (or 4488 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 23239872 is about 4820.7750414223. The cubic root of 23239872 is about 285.3719244006.

It can be divided in two parts, 232 and 39872, that added together give a palindrome (40104).

The spelling of 23239872 in words is "twenty-three million, two hundred thirty-nine thousand, eight hundred seventy-two".