23639964 has 12 divisors (see below), whose sum is σ = 55159944. Its totient is φ = 7879984.

The previous prime is 23639963. The next prime is 23639969. The reversal of 23639964 is 46993632.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23639963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984987 + ... + 985010.

It is an arithmetic number, because the mean of its divisors is an integer number (4596662).

Almost surely, 2^23639964 is an apocalyptic number.

It is an amenable number.

23639964 is an abundant number, since it is smaller than the sum of its proper divisors (31519980).

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

23639964 is a wasteful number, since it uses less digits than its factorization.

23639964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970004 (or 1970002 counting only the distinct ones).

The product of its digits is 209952, while the sum is 42.

The square root of 23639964 is about 4862.0946103506. The cubic root of 23639964 is about 287.0002468564. Note that the first 3 decimals are identical.

The spelling of 23639964 in words is "twenty-three million, six hundred thirty-nine thousand, nine hundred sixty-four".