265320320 has 128 divisors (see below), whose sum is σ = 672122880. Its totient is φ = 99993600.

The previous prime is 265320301. The next prime is 265320323. The reversal of 265320320 is 23023562.

It is a happy number.

265320320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265320323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852965 + ... + 853275.

It is an arithmetic number, because the mean of its divisors is an integer number (5250960).

Almost surely, 2^265320320 is an apocalyptic number.

265320320 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 265320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336061440).

265320320 is an abundant number, since it is smaller than the sum of its proper divisors (406802560).

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

265320320 is a wasteful number, since it uses less digits than its factorization.

265320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 265320320 is about 16288.6561753878. The cubic root of 265320320 is about 642.5745254133.

Adding to 265320320 its reverse (23023562), we get a palindrome (288343882).

The spelling of 265320320 in words is "two hundred sixty-five million, three hundred twenty thousand, three hundred twenty".