265830 has 16 divisors (see below), whose sum is σ = 638064. Its totient is φ = 70880.

The previous prime is 265819. The next prime is 265831. The reversal of 265830 is 38562.

It is a self number, because there is not a number n which added to its sum of digits gives 265830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265831) by changing a digit.

265830 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 7 ways as a sum of consecutive naturals, for example, 4401 + ... + 4460.

It is an arithmetic number, because the mean of its divisors is an integer number (39879).

2²⁶⁵⁸³⁰ is an apocalyptic number.

265830 is an abundant number, since it is smaller than the sum of its proper divisors (372234).

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

265830 is a wasteful number, since it uses less digits than its factorization.

265830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8871.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 265830 is about 515.5870440575. The cubic root of 265830 is about 64.2985723839.

The spelling of 265830 in words is "two hundred sixty-five thousand, eight hundred thirty".