22687164 has 72 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 7056000.

The previous prime is 22687157. The next prime is 22687199. The reversal of 22687164 is 46178622.

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 23 ways as a sum of consecutive naturals, for example, 32014 + ... + 32714.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^22687164 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 22687164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).

22687164 is an abundant number, since it is smaller than the sum of its proper divisors (38639556).

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

22687164 is a wasteful number, since it uses less digits than its factorization.

22687164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 766 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 22687164 is about 4763.1044498310. The cubic root of 22687164 is about 283.0914395260.

The spelling of 22687164 in words is "twenty-two million, six hundred eighty-seven thousand, one hundred sixty-four".