265408 has 56 divisors (see below), whose sum is σ = 640080. Its totient is φ = 107520.

The previous prime is 265403. The next prime is 265417. The reversal of 265408 is 804562.

It is not an unprimeable number, because it can be changed into a prime (265403) by changing a digit.

265408 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 (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9138 + ... + 9166.

It is an arithmetic number, because the mean of its divisors is an integer number (11430).

2²⁶⁵⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320040).

265408 is an abundant number, since it is smaller than the sum of its proper divisors (374672).

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

265408 is a wasteful number, since it uses less digits than its factorization.

265408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 265408 is about 515.1776392663. The cubic root of 265408 is about 64.2645301157.

It can be divided in two parts, 26 and 5408, that multiplied together give a cube (140608 = 52³).

The spelling of 265408 in words is "two hundred sixty-five thousand, four hundred eight".