22439809 has 4 divisors (see below), whose sum is σ = 25645504. Its totient is φ = 19234116.

The previous prime is 22439803. The next prime is 22439831. The reversal of 22439809 is 90893422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22439809 - 2³ = 22439801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22439801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1602837 + ... + 1602850.

It is an arithmetic number, because the mean of its divisors is an integer number (6411376).

Almost surely, 2^22439809 is an apocalyptic number.

It is an amenable number.

22439809 is a deficient number, since it is larger than the sum of its proper divisors (3205695).

22439809 is an equidigital number, since it uses as much as digits as its factorization.

22439809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205694.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 22439809 is about 4737.0675528221. The cubic root of 22439809 is about 282.0588420712.

The spelling of 22439809 in words is "twenty-two million, four hundred thirty-nine thousand, eight hundred nine".