265560280 has 64 divisors (see below), whose sum is σ = 615988800. Its totient is φ = 102973440.

The previous prime is 265560271. The next prime is 265560287. The reversal of 265560280 is 82065562.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265560287) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 316101 + ... + 316939.

It is an arithmetic number, because the mean of its divisors is an integer number (9624825).

Almost surely, 2^265560280 is an apocalyptic number.

265560280 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 265560280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307994400).

265560280 is an abundant number, since it is smaller than the sum of its proper divisors (350428520).

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

265560280 is a wasteful number, since it uses less digits than its factorization.

265560280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 265560280 is about 16296.0203730850. The cubic root of 265560280 is about 642.7681853157.

The spelling of 265560280 in words is "two hundred sixty-five million, five hundred sixty thousand, two hundred eighty".