265980 has 96 divisors (see below), whose sum is σ = 903168. Its totient is φ = 57600.

The previous prime is 265961. The next prime is 265987. The reversal of 265980 is 89562.

265980 = T₅₆ + T₅₇ + ... + T₁₂₀.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265987) by changing a digit.

265980 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 31 ways as a sum of consecutive naturals, for example, 8565 + ... + 8595.

It is an arithmetic number, because the mean of its divisors is an integer number (9408).

2²⁶⁵⁹⁸⁰ is an apocalyptic number.

265980 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 265980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451584).

265980 is an abundant number, since it is smaller than the sum of its proper divisors (637188).

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

265980 is a wasteful number, since it uses less digits than its factorization.

265980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 265980 is about 515.7324887963. The cubic root of 265980 is about 64.3106640369.

It can be divided in two parts, 26 and 5980, that added together give a palindrome (6006).

The spelling of 265980 in words is "two hundred sixty-five thousand, nine hundred eighty".