22158732 has 12 divisors (see below), whose sum is σ = 51703736. Its totient is φ = 7386240.

The previous prime is 22158713. The next prime is 22158733. The reversal of 22158732 is 23785122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 22158732.

It is not an unprimeable number, because it can be changed into a prime (22158733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923269 + ... + 923292.

Almost surely, 2^22158732 is an apocalyptic number.

It is an amenable number.

22158732 is an abundant number, since it is smaller than the sum of its proper divisors (29545004).

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

22158732 is a wasteful number, since it uses less digits than its factorization.

22158732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846568 (or 1846566 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 22158732 is about 4707.3062360548. The cubic root of 22158732 is about 280.8762177337.

The spelling of 22158732 in words is "twenty-two million, one hundred fifty-eight thousand, seven hundred thirty-two".