28540256 has 24 divisors (see below), whose sum is σ = 56450520. Its totient is φ = 14203648.

The previous prime is 28540249. The next prime is 28540301. The reversal of 28540256 is 65204582.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5300 + ... + 9228.

It is an arithmetic number, because the mean of its divisors is an integer number (2352105).

Almost surely, 2^28540256 is an apocalyptic number.

It is an amenable number.

28540256 is a deficient number, since it is larger than the sum of its proper divisors (27910264).

28540256 is a wasteful number, since it uses less digits than its factorization.

28540256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166 (or 4158 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 28540256 is about 5342.3081154123. The cubic root of 28540256 is about 305.5994874035.

The spelling of 28540256 in words is "twenty-eight million, five hundred forty thousand, two hundred fifty-six".