22355944 has 32 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 10213056.

The previous prime is 22355941. The next prime is 22355987. The reversal of 22355944 is 44955322.

It is a super-2 number, since 2×22355944² = 999576464262272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22355941) 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, 9669 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (1425060).

Almost surely, 2^22355944 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 22355944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22800960).

22355944 is an abundant number, since it is smaller than the sum of its proper divisors (23245976).

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

22355944 is a wasteful number, since it uses less digits than its factorization.

22355944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2205 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 22355944 is about 4728.2072712604. The cubic root of 22355944 is about 281.7070209718.

The spelling of 22355944 in words is "twenty-two million, three hundred fifty-five thousand, nine hundred forty-four".