28385539 has 16 divisors (see below), whose sum is σ = 35422912. Its totient is φ = 22146048.

The previous prime is 28385537. The next prime is 28385573. The reversal of 28385539 is 93558382.

It is a cyclic number.

It is not a de Polignac number, because 28385539 - 2¹ = 28385537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28385495 and 28385504.

It is not an unprimeable number, because it can be changed into a prime (28385531) 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, 4507 + ... + 8779.

It is an arithmetic number, because the mean of its divisors is an integer number (2213932).

Almost surely, 2^28385539 is an apocalyptic number.

28385539 is a deficient number, since it is larger than the sum of its proper divisors (7037373).

28385539 is a wasteful number, since it uses less digits than its factorization.

28385539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366.

The product of its digits is 259200, while the sum is 43.

The square root of 28385539 is about 5327.8080858830. The cubic root of 28385539 is about 305.0462672801.

The spelling of 28385539 in words is "twenty-eight million, three hundred eighty-five thousand, five hundred thirty-nine".