28539856 has 40 divisors (see below), whose sum is σ = 57000320. Its totient is φ = 13837824.

The previous prime is 28539853. The next prime is 28539877. The reversal of 28539856 is 65893582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84520 + ... + 84856.

It is an arithmetic number, because the mean of its divisors is an integer number (1425008).

Almost surely, 2^28539856 is an apocalyptic number.

It is an amenable number.

28539856 is a deficient number, since it is larger than the sum of its proper divisors (28460464).

28539856 is a wasteful number, since it uses less digits than its factorization.

28539856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 485 counting only the distinct ones).

The product of its digits is 518400, while the sum is 46.

The square root of 28539856 is about 5342.2706782790. The cubic root of 28539856 is about 305.5980597083.

The spelling of 28539856 in words is "twenty-eight million, five hundred thirty-nine thousand, eight hundred fifty-six".