23439689 has 24 divisors (see below), whose sum is σ = 30336768. Its totient is φ = 17932320.

The previous prime is 23439683. The next prime is 23439733. The reversal of 23439689 is 98693432.

It is a de Polignac number, because none of the positive numbers 2^k-23439689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23439683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19154 + ... + 20340.

It is an arithmetic number, because the mean of its divisors is an integer number (1264032).

Almost surely, 2^23439689 is an apocalyptic number.

It is an amenable number.

23439689 is a deficient number, since it is larger than the sum of its proper divisors (6897079).

23439689 is a wasteful number, since it uses less digits than its factorization.

23439689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1238 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 23439689 is about 4841.4552564286. The cubic root of 23439689 is about 286.1874697991.

The spelling of 23439689 in words is "twenty-three million, four hundred thirty-nine thousand, six hundred eighty-nine".