28804839 has 16 divisors (see below), whose sum is σ = 44041728. Its totient is φ = 16404192.

The previous prime is 28804813. The next prime is 28804873. The reversal of 28804839 is 93840882.

It is a happy number.

It is not a de Polignac number, because 28804839 - 2⁵ = 28804807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28804839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28804879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4494 + ... + 8820.

It is an arithmetic number, because the mean of its divisors is an integer number (2752608).

Almost surely, 2^28804839 is an apocalyptic number.

28804839 is a deficient number, since it is larger than the sum of its proper divisors (15236889).

28804839 is a wasteful number, since it uses less digits than its factorization.

28804839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 28804839 is about 5367.0139742691. The cubic root of 28804839 is about 306.5409394559.

The spelling of 28804839 in words is "twenty-eight million, eight hundred four thousand, eight hundred thirty-nine".