22687872 has 32 divisors (see below), whose sum is σ = 60265680. Its totient is φ = 7562496.

The previous prime is 22687871. The next prime is 22687879. The reversal of 22687872 is 27878622.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22687871) 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, 29158 + ... + 29925.

Almost surely, 2^22687872 is an apocalyptic number.

It is an amenable number.

22687872 is an abundant number, since it is smaller than the sum of its proper divisors (37577808).

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

22687872 is an equidigital number, since it uses as much as digits as its factorization.

22687872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59100 (or 59088 counting only the distinct ones).

The product of its digits is 150528, while the sum is 42.

The square root of 22687872 is about 4763.1787705271. The cubic root of 22687872 is about 283.0943843138.

The spelling of 22687872 in words is "twenty-two million, six hundred eighty-seven thousand, eight hundred seventy-two".