255728 has 20 divisors (see below), whose sum is σ = 540888. Its totient is φ = 116160.

The previous prime is 255713. The next prime is 255733. The reversal of 255728 is 827552.

It is a self number, because there is not a number n which added to its sum of digits gives 255728.

It is a congruent number.

It is an unprimeable number.

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, 551 + ... + 902.

2²⁵⁵⁷²⁸ is an apocalyptic number.

It is an amenable number.

255728 is an abundant number, since it is smaller than the sum of its proper divisors (285160).

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

255728 is a wasteful number, since it uses less digits than its factorization.

255728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1466 counting only the distinct ones).

The product of its digits is 5600, while the sum is 29.

The square root of 255728 is about 505.6955605896. The cubic root of 255728 is about 63.4735459279.

The spelling of 255728 in words is "two hundred fifty-five thousand, seven hundred twenty-eight".