23428889 has 8 divisors (see below), whose sum is σ = 26103168. Its totient is φ = 20845360.

The previous prime is 23428883. The next prime is 23428921. The reversal of 23428889 is 98882432.

23428889 = 563² + 564² + ... + 628².

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23428889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23428883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22142 + ... + 23175.

It is an arithmetic number, because the mean of its divisors is an integer number (3262896).

Almost surely, 2^23428889 is an apocalyptic number.

It is an amenable number.

23428889 is a deficient number, since it is larger than the sum of its proper divisors (2674279).

23428889 is a wasteful number, since it uses less digits than its factorization.

23428889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45375.

The product of its digits is 221184, while the sum is 44.

The square root of 23428889 is about 4840.3397608019. The cubic root of 23428889 is about 286.1435087565.

The spelling of 23428889 in words is "twenty-three million, four hundred twenty-eight thousand, eight hundred eighty-nine".