28110839 has 4 divisors (see below), whose sum is σ = 28129920. Its totient is φ = 28091760.

The previous prime is 28110833. The next prime is 28110881. The reversal of 28110839 is 93801182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93801182 = 2 ⋅46900591.

It is a cyclic number.

It is not a de Polignac number, because 28110839 - 2²⁰ = 27062263 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 (28110833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7127 + ... + 10344.

It is an arithmetic number, because the mean of its divisors is an integer number (7032480).

Almost surely, 2^28110839 is an apocalyptic number.

28110839 is a deficient number, since it is larger than the sum of its proper divisors (19081).

28110839 is a wasteful number, since it uses less digits than its factorization.

28110839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19080.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 28110839 is about 5301.9655789150. The cubic root of 28110839 is about 304.0590511730.

The spelling of 28110839 in words is "twenty-eight million, one hundred ten thousand, eight hundred thirty-nine".