22440039 has 4 divisors (see below), whose sum is σ = 29920056. Its totient is φ = 14960024.

The previous prime is 22440037. The next prime is 22440043. The reversal of 22440039 is 93004422.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22440039 - 2¹ = 22440037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3740004 + ... + 3740009.

It is an arithmetic number, because the mean of its divisors is an integer number (7480014).

Almost surely, 2^22440039 is an apocalyptic number.

22440039 is a deficient number, since it is larger than the sum of its proper divisors (7480017).

22440039 is an equidigital number, since it uses as much as digits as its factorization.

22440039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480016.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 22440039 is about 4737.0918293822. The cubic root of 22440039 is about 282.0598057353.

The spelling of 22440039 in words is "twenty-two million, four hundred forty thousand, thirty-nine".