28790839 has 16 divisors (see below), whose sum is σ = 36357120. Its totient is φ = 22145760.

The previous prime is 28790807. The next prime is 28790849. The reversal of 28790839 is 93809782.

It is not a de Polignac number, because 28790839 - 2⁵ = 28790807 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 (28790849) 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, 3717 + ... + 8449.

It is an arithmetic number, because the mean of its divisors is an integer number (2272320).

Almost surely, 2^28790839 is an apocalyptic number.

28790839 is a deficient number, since it is larger than the sum of its proper divisors (7566281).

28790839 is a wasteful number, since it uses less digits than its factorization.

28790839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 28790839 is about 5365.7095523332. The cubic root of 28790839 is about 306.4912687667.

The spelling of 28790839 in words is "twenty-eight million, seven hundred ninety thousand, eight hundred thirty-nine".