265430320 has 20 divisors (see below), whose sum is σ = 617125680. Its totient is φ = 106172096.

The previous prime is 265430311. The next prime is 265430353. The reversal of 265430320 is 23034562.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1658860 + ... + 1659019.

It is an arithmetic number, because the mean of its divisors is an integer number (30856284).

Almost surely, 2^265430320 is an apocalyptic number.

265430320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265430320 is an abundant number, since it is smaller than the sum of its proper divisors (351695360).

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

265430320 is a wasteful number, since it uses less digits than its factorization.

265430320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317892 (or 3317886 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 265430320 is about 16292.0324085118. The cubic root of 265430320 is about 642.6633154864.

Adding to 265430320 its reverse (23034562), we get a palindrome (288464882).

The spelling of 265430320 in words is "two hundred sixty-five million, four hundred thirty thousand, three hundred twenty".