265792640 has 64 divisors (see below), whose sum is σ = 646272000. Its totient is φ = 104500224.

The previous prime is 265792621. The next prime is 265792651. The reversal of 265792640 is 46297562.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34241 + ... + 41279.

It is an arithmetic number, because the mean of its divisors is an integer number (10098000).

Almost surely, 2^265792640 is an apocalyptic number.

265792640 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 265792640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323136000).

265792640 is an abundant number, since it is smaller than the sum of its proper divisors (380479360).

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

265792640 is an equidigital number, since it uses as much as digits as its factorization.

265792640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117 (or 7105 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 265792640 is about 16303.1481622415. The cubic root of 265792640 is about 642.9556004871.

The spelling of 265792640 in words is "two hundred sixty-five million, seven hundred ninety-two thousand, six hundred forty".