22028849 has 6 divisors (see below), whose sum is σ = 22596966. Its totient is φ = 21462240.

The previous prime is 22028843. The next prime is 22028887. The reversal of 22028849 is 94882022.

It can be written as a sum of positive squares in 3 ways, for example, as 10195249 + 11833600 = 3193^2 + 3440^2 .

It is not a de Polignac number, because 22028849 - 2⁴ = 22028833 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22028843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29687 + ... + 30419.

It is an arithmetic number, because the mean of its divisors is an integer number (3766161).

Almost surely, 2^22028849 is an apocalyptic number.

It is an amenable number.

22028849 is a deficient number, since it is larger than the sum of its proper divisors (568117).

22028849 is an frugal number, since it uses more digits than its factorization.

22028849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 22028849 is about 4693.4900660383. The cubic root of 22028849 is about 280.3263584056.

The spelling of 22028849 in words is "twenty-two million, twenty-eight thousand, eight hundred forty-nine".