275538 has 16 divisors (see below), whose sum is σ = 580320. Its totient is φ = 86976.

The previous prime is 275531. The next prime is 275543. The reversal of 275538 is 835572.

It is a happy number.

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 275538.

It is not an unprimeable number, because it can be changed into a prime (275531) by changing a digit.

275538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 1322.

It is an arithmetic number, because the mean of its divisors is an integer number (36270).

2²⁷⁵⁵³⁸ is an apocalyptic number.

275538 is an abundant number, since it is smaller than the sum of its proper divisors (304782).

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

275538 is a wasteful number, since it uses less digits than its factorization.

275538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its digits is 8400, while the sum is 30.

The square root of 275538 is about 524.9171363177. The cubic root of 275538 is about 65.0719518815.

It can be divided in two parts, 27 and 5538, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 275538 in words is "two hundred seventy-five thousand, five hundred thirty-eight".