265994880 has 256 divisors, whose sum is σ = 904780800. Its totient is φ = 66355200.

The previous prime is 265994867. The next prime is 265994899. The reversal of 265994880 is 88499562.

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, 2440266 + ... + 2440374.

It is an arithmetic number, because the mean of its divisors is an integer number (3534300).

Almost surely, 2^265994880 is an apocalyptic number.

265994880 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 265994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452390400).

265994880 is an abundant number, since it is smaller than the sum of its proper divisors (638785920).

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

265994880 is a wasteful number, since it uses less digits than its factorization.

265994880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 265994880 is about 16309.3494658739. The cubic root of 265994880 is about 643.1186328101.

The spelling of 265994880 in words is "two hundred sixty-five million, nine hundred ninety-four thousand, eight hundred eighty".