275780 has 12 divisors (see below), whose sum is σ = 579180. Its totient is φ = 110304.

The previous prime is 275773. The next prime is 275783. The reversal of 275780 is 87572.

It can be written as a sum of positive squares in 2 ways, for example, as 200704 + 75076 = 448^2 + 274^2 .

It is not an unprimeable number, because it can be changed into a prime (275783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6875 + ... + 6914.

It is an arithmetic number, because the mean of its divisors is an integer number (48265).

2²⁷⁵⁷⁸⁰ is an apocalyptic number.

275780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275780 is an abundant number, since it is smaller than the sum of its proper divisors (303400).

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

275780 is a wasteful number, since it uses less digits than its factorization.

275780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13798 (or 13796 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 275780 is about 525.1475982998. The cubic root of 275780 is about 65.0909968098.

The spelling of 275780 in words is "two hundred seventy-five thousand, seven hundred eighty".