22000439 has 4 divisors (see below), whose sum is σ = 22010256. Its totient is φ = 21990624.

The previous prime is 22000427. The next prime is 22000441. The reversal of 22000439 is 93400022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 93400022 = 2 ⋅46700011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22000439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22000439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000409) 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, 287 + ... + 6639.

It is an arithmetic number, because the mean of its divisors is an integer number (5502564).

Almost surely, 2^22000439 is an apocalyptic number.

22000439 is a deficient number, since it is larger than the sum of its proper divisors (9817).

22000439 is an equidigital number, since it uses as much as digits as its factorization.

22000439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 22000439 is about 4690.4625571472. The cubic root of 22000439 is about 280.2057968338.

The spelling of 22000439 in words is "twenty-two million, four hundred thirty-nine", and thus it is an aban number.