28839806 has 4 divisors (see below), whose sum is σ = 43259712. Its totient is φ = 14419902.

The previous prime is 28839793. The next prime is 28839847. The reversal of 28839806 is 60893882.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7209950 + ... + 7209953.

It is an arithmetic number, because the mean of its divisors is an integer number (10814928).

Almost surely, 2^28839806 is an apocalyptic number.

28839806 is a deficient number, since it is larger than the sum of its proper divisors (14419906).

28839806 is a wasteful number, since it uses less digits than its factorization.

28839806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14419905.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 28839806 is about 5370.2705704648. The cubic root of 28839806 is about 306.6649288391.

The spelling of 28839806 in words is "twenty-eight million, eight hundred thirty-nine thousand, eight hundred six".