22440438 has 24 divisors (see below), whose sum is σ = 48976200. Its totient is φ = 7425504.

The previous prime is 22440437. The next prime is 22440449. The reversal of 22440438 is 83404422.

It is a happy number.

22440438 is a `hidden beast` number, since 224 + 4 + 0 + 438 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1983 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (2040675).

Almost surely, 2^22440438 is an apocalyptic number.

22440438 is an abundant number, since it is smaller than the sum of its proper divisors (26535762).

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

22440438 is a wasteful number, since it uses less digits than its factorization.

22440438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9116 (or 9113 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 22440438 is about 4737.1339436415. The cubic root of 22440438 is about 282.0614774673.

The spelling of 22440438 in words is "twenty-two million, four hundred forty thousand, four hundred thirty-eight".