276556 has 36 divisors (see below), whose sum is σ = 603288. Its totient is φ = 110208.

The previous prime is 276553. The next prime is 276557. The reversal of 276556 is 655672.

276556 is nontrivially palindromic in base 3.

It is a super-2 number, since 2×276556² = 152966442272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276553) 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 11 ways as a sum of consecutive naturals, for example, 3291 + ... + 3373.

It is an arithmetic number, because the mean of its divisors is an integer number (16758).

276556 is a Friedman number, since it can be written as 6^7-65*52, using all its digits and the basic arithmetic operations.

2²⁷⁶⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301644).

276556 is an abundant number, since it is smaller than the sum of its proper divisors (326732).

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

276556 is a wasteful number, since it uses less digits than its factorization.

276556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 109 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 276556 is about 525.8859191878. The cubic root of 276556 is about 65.1519914568.

The spelling of 276556 in words is "two hundred seventy-six thousand, five hundred fifty-six".