22881636 has 24 divisors (see below), whose sum is σ = 59323040. Its totient is φ = 7627176.

The previous prime is 22881623. The next prime is 22881641. The reversal of 22881636 is 63618822.

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 22881636.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105826 + ... + 106041.

Almost surely, 2^22881636 is an apocalyptic number.

It is an amenable number.

22881636 is an abundant number, since it is smaller than the sum of its proper divisors (36441404).

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

22881636 is a wasteful number, since it uses less digits than its factorization.

22881636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211880 (or 211872 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 22881636 is about 4783.4753056747. The cubic root of 22881636 is about 283.8980160171.

The spelling of 22881636 in words is "twenty-two million, eight hundred eighty-one thousand, six hundred thirty-six".