28591256 has 32 divisors (see below), whose sum is σ = 54743040. Its totient is φ = 13997088.

The previous prime is 28591243. The next prime is 28591261. The reversal of 28591256 is 65219582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108581 + ... + 108843.

It is an arithmetic number, because the mean of its divisors is an integer number (1710720).

Almost surely, 2^28591256 is an apocalyptic number.

It is an amenable number.

28591256 is a deficient number, since it is larger than the sum of its proper divisors (26151784).

28591256 is a wasteful number, since it uses less digits than its factorization.

28591256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 499 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 28591256 is about 5347.0792027050. The cubic root of 28591256 is about 305.7814093821.

The spelling of 28591256 in words is "twenty-eight million, five hundred ninety-one thousand, two hundred fifty-six".