265285680 has 320 divisors, whose sum is σ = 995079168. Its totient is φ = 57671680.

The previous prime is 265285661. The next prime is 265285681. The reversal of 265285680 is 86582562.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (265285681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1032112 + ... + 1032368.

Almost surely, 2^265285680 is an apocalyptic number.

265285680 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 265285680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497539584).

265285680 is an abundant number, since it is smaller than the sum of its proper divisors (729793488).

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

265285680 is a wasteful number, since it uses less digits than its factorization.

265285680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 265285680 is about 16287.5928239872. The cubic root of 265285680 is about 642.5465595312.

The spelling of 265285680 in words is "two hundred sixty-five million, two hundred eighty-five thousand, six hundred eighty".