265463880 has 128 divisors (see below), whose sum is σ = 879621120. Its totient is φ = 63553280.

The previous prime is 265463827. The next prime is 265463893. The reversal of 265463880 is 88364562.

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 31 ways as a sum of consecutive naturals, for example, 108349 + ... + 110771.

It is an arithmetic number, because the mean of its divisors is an integer number (6872040).

Almost surely, 2^265463880 is an apocalyptic number.

265463880 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 265463880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439810560).

265463880 is an abundant number, since it is smaller than the sum of its proper divisors (614157240).

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

265463880 is a wasteful number, since it uses less digits than its factorization.

265463880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531 (or 2527 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 265463880 is about 16293.0623272606. The cubic root of 265463880 is about 642.6903996466.

The spelling of 265463880 in words is "two hundred sixty-five million, four hundred sixty-three thousand, eight hundred eighty".