265856880 has 120 divisors (see below), whose sum is σ = 875716272. Its totient is φ = 66707456.

The previous prime is 265856867. The next prime is 265856893. The reversal of 265856880 is 88658562.

It is an interprime number because it is at equal distance from previous prime (265856867) and next prime (265856893).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67444 + ... + 71276.

Almost surely, 2^265856880 is an apocalyptic number.

265856880 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 265856880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437858136).

265856880 is an abundant number, since it is smaller than the sum of its proper divisors (609859392).

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

265856880 is a wasteful number, since it uses less digits than its factorization.

265856880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3883 (or 3860 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 48.

The square root of 265856880 is about 16305.1182148428. The cubic root of 265856880 is about 643.0073954260.

The spelling of 265856880 in words is "two hundred sixty-five million, eight hundred fifty-six thousand, eight hundred eighty".