23865989 has 24 divisors (see below), whose sum is σ = 29132928. Its totient is φ = 19474560.

The previous prime is 23865901. The next prime is 23865991. The reversal of 23865989 is 98956832.

It is not a de Polignac number, because 23865989 - 2⁸ = 23865733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23865089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98909 + ... + 99149.

It is an arithmetic number, because the mean of its divisors is an integer number (1213872).

Almost surely, 2^23865989 is an apocalyptic number.

It is an amenable number.

23865989 is a deficient number, since it is larger than the sum of its proper divisors (5266939).

23865989 is a wasteful number, since it uses less digits than its factorization.

23865989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 338 counting only the distinct ones).

The product of its digits is 933120, while the sum is 50.

The square root of 23865989 is about 4885.2828986662. The cubic root of 23865989 is about 287.9120302633.

The spelling of 23865989 in words is "twenty-three million, eight hundred sixty-five thousand, nine hundred eighty-nine".