22159844 has 48 divisors (see below), whose sum is σ = 46099200. Its totient is φ = 9123840.

The previous prime is 22159831. The next prime is 22159861. The reversal of 22159844 is 44895122.

It is a super-2 number, since 2×22159844² = 982117372208672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111257 + ... + 111455.

It is an arithmetic number, because the mean of its divisors is an integer number (960400).

Almost surely, 2^22159844 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 22159844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23049600).

22159844 is an abundant number, since it is smaller than the sum of its proper divisors (23939356).

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

22159844 is a wasteful number, since it uses less digits than its factorization.

22159844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 346 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 22159844 is about 4707.4243488345. The cubic root of 22159844 is about 280.8809160941.

The spelling of 22159844 in words is "twenty-two million, one hundred fifty-nine thousand, eight hundred forty-four".