23687136 has 72 divisors (see below), whose sum is σ = 73493784. Its totient is φ = 7176960.

The previous prime is 23687119. The next prime is 23687149. The reversal of 23687136 is 63178632.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×23687136² = 1122160823764992, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 23687136.

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, 571 + ... + 6906.

It is an arithmetic number, because the mean of its divisors is an integer number (1020747).

Almost surely, 2^23687136 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 23687136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36746892).

23687136 is an abundant number, since it is smaller than the sum of its proper divisors (49806648).

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

23687136 is a wasteful number, since it uses less digits than its factorization.

23687136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504 (or 7493 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 23687136 is about 4866.9431884911. The cubic root of 23687136 is about 287.1910167554.

The spelling of 23687136 in words is "twenty-three million, six hundred eighty-seven thousand, one hundred thirty-six".