265880 has 48 divisors (see below), whose sum is σ = 663120. Its totient is φ = 95744.

The previous prime is 265873. The next prime is 265883. The reversal of 265880 is 88562.

265880 = T₅₁ + T₅₂ + ... + T₁₁₉.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265883) 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, 11549 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (13815).

2²⁶⁵⁸⁸⁰ is an apocalyptic number.

265880 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 265880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331560).

265880 is an abundant number, since it is smaller than the sum of its proper divisors (397240).

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

265880 is a wasteful number, since it uses less digits than its factorization.

265880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 265880 is about 515.6355301955. The cubic root of 265880 is about 64.3026034402.

The spelling of 265880 in words is "two hundred sixty-five thousand, eight hundred eighty".