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276 = 22323

• 276 can be written using four 4's:

See also 113.
276 has 12 divisors (see below), whose sum is σ = 672. Its totient is φ = 88.

The previous prime is 271. The next prime is 277. The reversal of 276 is 672.

276 = T4 + T5 + ... + T11.

276 = 15 + 25 + 35.

276 is nontrivially palindromic in base 8.

276 is an esthetic number in base 5 and base 7, because in such bases its adjacent digits differ by 1.

276 is a nontrivial binomial coefficient, being equal to C(24, 2).

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between even and odd.

276 is an undulating number in base 8.

Its product of digits (84) is a multiple of the sum of its prime divisors (28).

It is a plaindrome in base 9, base 14, base 15 and base 16.

It is a nialpdrome in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 276.

It is not an unprimeable number, because it can be changed into a prime (271) by changing a digit.

276 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 (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 23.

It is an arithmetic number, because the mean of its divisors is an integer number (56).

276 is the 23-rd triangular number and also the 12-th hexagonal number.

276 is the 11-th centered pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336).

276 is an abundant number, since it is smaller than the sum of its proper divisors (396).

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

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

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

The sum of its prime factors is 30 (or 28 counting only the distinct ones).

The product of its digits is 84, while the sum is 15.

The square root of 276 is about 16.6132477258. The cubic root of 276 is about 6.5108300715.

It can be divided in two parts, 27 and 6, that added together give a palindrome (33).

The spelling of 276 in words is "two hundred seventy-six", and thus it is an aban number.

Divisors: 1 2 3 4 6 12 23 46 69 92 138 276