23128239 has 8 divisors (see below), whose sum is σ = 30906112. Its totient is φ = 15384600.

The previous prime is 23128229. The next prime is 23128241. The reversal of 23128239 is 93282132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23128239 - 2⁸ = 23127983 is a prime.

It is a super-2 number, since 2×23128239² = 1069830878482242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6937 + ... + 9714.

It is an arithmetic number, because the mean of its divisors is an integer number (3863264).

Almost surely, 2^23128239 is an apocalyptic number.

23128239 is a deficient number, since it is larger than the sum of its proper divisors (7777873).

23128239 is a wasteful number, since it uses less digits than its factorization.

23128239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17117.

The product of its digits is 5184, while the sum is 30.

The square root of 23128239 is about 4809.1827788097. The cubic root of 23128239 is about 284.9142616825.

The spelling of 23128239 in words is "twenty-three million, one hundred twenty-eight thousand, two hundred thirty-nine".