275728 has 20 divisors (see below), whose sum is σ = 562960. Its totient is φ = 130464.

The previous prime is 275719. The next prime is 275729. The reversal of 275728 is 827572.

It is a self number, because there is not a number n which added to its sum of digits gives 275728.

It is not an unprimeable number, because it can be changed into a prime (275729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (28148).

2²⁷⁵⁷²⁸ is an apocalyptic number.

It is an amenable number.

275728 is an abundant number, since it is smaller than the sum of its proper divisors (287232).

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

275728 is a wasteful number, since it uses less digits than its factorization.

275728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 928 counting only the distinct ones).

The product of its digits is 7840, while the sum is 31.

The square root of 275728 is about 525.0980860754. The cubic root of 275728 is about 65.0869054513.

The spelling of 275728 in words is "two hundred seventy-five thousand, seven hundred twenty-eight".