22239636 has 24 divisors (see below), whose sum is σ = 53682720. Its totient is φ = 7157472.

The previous prime is 22239631. The next prime is 22239653. The reversal of 22239636 is 63693222.

It is a junction number, because it is equal to n+sod(n) for n = 22239597 and 22239606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22239631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31606 + ... + 32301.

It is an arithmetic number, because the mean of its divisors is an integer number (2236780).

Almost surely, 2^22239636 is an apocalyptic number.

It is an amenable number.

22239636 is an abundant number, since it is smaller than the sum of its proper divisors (31443084).

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

22239636 is a wasteful number, since it uses less digits than its factorization.

22239636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63943 (or 63941 counting only the distinct ones).

The product of its digits is 23328, while the sum is 33.

The square root of 22239636 is about 4715.8918562664. The cubic root of 22239636 is about 281.2176393384.

The spelling of 22239636 in words is "twenty-two million, two hundred thirty-nine thousand, six hundred thirty-six".