22439808 has 128 divisors (see below), whose sum is σ = 68217600. Its totient is φ = 7257600.

The previous prime is 22439803. The next prime is 22439831. The reversal of 22439808 is 80893422.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22439801) 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, 148533 + ... + 148683.

It is an arithmetic number, because the mean of its divisors is an integer number (532950).

Almost surely, 2^22439808 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 22439808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34108800).

22439808 is an abundant number, since it is smaller than the sum of its proper divisors (45777792).

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

22439808 is a wasteful number, since it uses less digits than its factorization.

22439808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 22439808 is about 4737.0674472716. The cubic root of 22439808 is about 282.0588378814.

The spelling of 22439808 in words is "twenty-two million, four hundred thirty-nine thousand, eight hundred eight".