23988564 has 72 divisors (see below), whose sum is σ = 67616640. Its totient is φ = 7126272.

The previous prime is 23988551. The next prime is 23988571. The reversal of 23988564 is 46588932.

23988564 is a `hidden beast` number, since 2 + 3 + 9 + 88 + 564 = 666.

It is a congruent number.

It is an unprimeable number.

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, 10597 + ... + 12659.

It is an arithmetic number, because the mean of its divisors is an integer number (939120).

Almost surely, 2^23988564 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 23988564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33808320).

23988564 is an abundant number, since it is smaller than the sum of its proper divisors (43628076).

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

23988564 is a wasteful number, since it uses less digits than its factorization.

23988564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2104 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 23988564 is about 4897.8121646302. The cubic root of 23988564 is about 288.4040913212.

The spelling of 23988564 in words is "twenty-three million, nine hundred eighty-eight thousand, five hundred sixty-four".