22138032 has 80 divisors (see below), whose sum is σ = 66995712. Its totient is φ = 6167040.

The previous prime is 22138031. The next prime is 22138037. The reversal of 22138032 is 23083122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22138031) 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 15 ways as a sum of consecutive naturals, for example, 12973 + ... + 14579.

Almost surely, 2^22138032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22138032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33497856).

22138032 is an abundant number, since it is smaller than the sum of its proper divisors (44857680).

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

22138032 is a wasteful number, since it uses less digits than its factorization.

22138032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22138032 is about 4705.1070125981. The cubic root of 22138032 is about 280.7887285352.

The spelling of 22138032 in words is "twenty-two million, one hundred thirty-eight thousand, thirty-two".