28875856 has 20 divisors (see below), whose sum is σ = 58380192. Its totient is φ = 13810016.

The previous prime is 28875853. The next prime is 28875857. The reversal of 28875856 is 65857882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28875853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38866 + ... + 39601.

Almost surely, 2^28875856 is an apocalyptic number.

It is an amenable number.

28875856 is an abundant number, since it is smaller than the sum of its proper divisors (29504336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28875856 is a wasteful number, since it uses less digits than its factorization.

28875856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78498 (or 78492 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The square root of 28875856 is about 5373.6259639093. The cubic root of 28875856 is about 306.7926535481.

The spelling of 28875856 in words is "twenty-eight million, eight hundred seventy-five thousand, eight hundred fifty-six".