28545839 has 16 divisors (see below), whose sum is σ = 34913088. Its totient is φ = 22781952.

The previous prime is 28545827. The next prime is 28545841. The reversal of 28545839 is 93854582.

It is a cyclic number.

It is not a de Polignac number, because 28545839 - 2²⁰ = 27497263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28545839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545859) 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, 10307 + ... + 12779.

It is an arithmetic number, because the mean of its divisors is an integer number (2182068).

Almost surely, 2^28545839 is an apocalyptic number.

28545839 is a deficient number, since it is larger than the sum of its proper divisors (6367249).

28545839 is a wasteful number, since it uses less digits than its factorization.

28545839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594.

The product of its digits is 345600, while the sum is 44.

The square root of 28545839 is about 5342.8306168173. The cubic root of 28545839 is about 305.6194130680.

The spelling of 28545839 in words is "twenty-eight million, five hundred forty-five thousand, eight hundred thirty-nine".