22331844 has 18 divisors (see below), whose sum is σ = 56450030. Its totient is φ = 7443936.

The previous prime is 22331833. The next prime is 22331849. The reversal of 22331844 is 44813322.

It can be written as a sum of positive squares in only one way, i.e., 14976900 + 7354944 = 3870^2 + 2712^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×22331844² = 997422512880672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22331849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310129 + ... + 310200.

Almost surely, 2^22331844 is an apocalyptic number.

It is an amenable number.

22331844 is an abundant number, since it is smaller than the sum of its proper divisors (34118186).

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

22331844 is a wasteful number, since it uses less digits than its factorization.

22331844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620339 (or 620334 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 22331844 is about 4725.6580494149. The cubic root of 22331844 is about 281.6057566241.

The spelling of 22331844 in words is "twenty-two million, three hundred thirty-one thousand, eight hundred forty-four".