23138964 has 36 divisors (see below), whose sum is σ = 59046624. Its totient is φ = 7639632.

The previous prime is 23138959. The next prime is 23138981. The reversal of 23138964 is 46983132.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 849 + ... + 6855.

It is an arithmetic number, because the mean of its divisors is an integer number (1640184).

Almost surely, 2^23138964 is an apocalyptic number.

It is an amenable number.

23138964 is an abundant number, since it is smaller than the sum of its proper divisors (35907660).

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

23138964 is a wasteful number, since it uses less digits than its factorization.

23138964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124 (or 6119 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 23138964 is about 4810.2977038849. The cubic root of 23138964 is about 284.9582949131.

The spelling of 23138964 in words is "twenty-three million, one hundred thirty-eight thousand, nine hundred sixty-four".