23169564 has 108 divisors (see below), whose sum is σ = 67099032. Its totient is φ = 6985440.

The previous prime is 23169563. The next prime is 23169571. The reversal of 23169564 is 46596132.

It is a happy number.

23169564 is a `hidden beast` number, since 2 + 31 + 69 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23169563) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 117514 + ... + 117710.

Almost surely, 2^23169564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23169564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33549516).

23169564 is an abundant number, since it is smaller than the sum of its proper divisors (43929468).

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

23169564 is a wasteful number, since it uses less digits than its factorization.

23169564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 213 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 23169564 is about 4813.4773293327. The cubic root of 23169564 is about 285.0838534423.

The spelling of 23169564 in words is "twenty-three million, one hundred sixty-nine thousand, five hundred sixty-four".