275286 has 32 divisors (see below), whose sum is σ = 620928. Its totient is φ = 80640.

The previous prime is 275269. The next prime is 275299. The reversal of 275286 is 682572.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

275286 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2790 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (19404).

2²⁷⁵²⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310464).

275286 is an abundant number, since it is smaller than the sum of its proper divisors (345642).

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

275286 is a wasteful number, since it uses less digits than its factorization.

275286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156.

The product of its digits is 6720, while the sum is 30.

The square root of 275286 is about 524.6770435230. The cubic root of 275286 is about 65.0521081171.

It can be divided in two parts, 275 and 286, that added together give a triangular number (561 = T₃₃).

The spelling of 275286 in words is "two hundred seventy-five thousand, two hundred eighty-six".