22087638 has 24 divisors (see below), whose sum is σ = 48971208. Its totient is φ = 7191072.

The previous prime is 22087621. The next prime is 22087649. The reversal of 22087638 is 83678022.

It is a happy number.

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, 13495 + ... + 15042.

It is an arithmetic number, because the mean of its divisors is an integer number (2040467).

Almost surely, 2^22087638 is an apocalyptic number.

22087638 is an abundant number, since it is smaller than the sum of its proper divisors (26883570).

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

22087638 is a wasteful number, since it uses less digits than its factorization.

22087638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28588 (or 28585 counting only the distinct ones).

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

The square root of 22087638 is about 4699.7487166869. The cubic root of 22087638 is about 280.5755084736.

The spelling of 22087638 in words is "twenty-two million, eighty-seven thousand, six hundred thirty-eight".