28530855 has 24 divisors (see below), whose sum is σ = 49666032. Its totient is φ = 15151104.

The previous prime is 28530847. The next prime is 28530857. The reversal of 28530855 is 55803582.

It is not a de Polignac number, because 28530855 - 2³ = 28530847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10332 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (2069418).

Almost surely, 2^28530855 is an apocalyptic number.

28530855 is a deficient number, since it is larger than the sum of its proper divisors (21135177).

28530855 is a wasteful number, since it uses less digits than its factorization.

28530855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2732 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 28530855 is about 5341.4281798036. The cubic root of 28530855 is about 305.5659294672.

The spelling of 28530855 in words is "twenty-eight million, five hundred thirty thousand, eight hundred fifty-five".