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260 = 22513

• 260 can be written using four 4's:

See also 113.
260 has 12 divisors (see below), whose sum is σ = 588. Its totient is φ = 96.

The previous prime is 257. The next prime is 263. The reversal of 260 is 62.

260 is nontrivially palindromic in base 8.

260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (257) and next prime (263).

It can be written as a sum of positive squares in 2 ways, for example, as 64 + 196 = 8^2 + 14^2 .

It is an Ulam number.

It is a O'Halloran number.

260 is an undulating number in base 5 and base 8.

It is a plaindrome in base 6, base 14 and base 15.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 26.

It is an arithmetic number, because the mean of its divisors is an integer number (49).

It is the magic constant of a 8 × 8 magic square.

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

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294).

260 is an abundant number, since it is smaller than the sum of its proper divisors (328).

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

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

260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22 (or 20 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 260 is about 16.1245154966. The cubic root of 260 is about 6.3825042989.

Adding to 260 its product of nonzero digits (12), we get a palindrome (272).

It can be divided in two parts, 2 and 60, that multiplied together give a triangular number (120 = T15).

The spelling of 260 in words is "two hundred sixty", and thus it is an aban number.

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260