265455780 has 48 divisors (see below), whose sum is σ = 748972224. Its totient is φ = 70245760.

The previous prime is 265455779. The next prime is 265455787. The reversal of 265455780 is 87554562.

It is a super-2 number, since 2×265455780² = 140933542270816800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (265455787) 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, 9027 + ... + 24746.

It is an arithmetic number, because the mean of its divisors is an integer number (15603588).

Almost surely, 2^265455780 is an apocalyptic number.

265455780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265455780 is an abundant number, since it is smaller than the sum of its proper divisors (483516444).

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

265455780 is a wasteful number, since it uses less digits than its factorization.

265455780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33916 (or 33914 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 265455780 is about 16292.8137533085. The cubic root of 265455780 is about 642.6838628562.

The spelling of 265455780 in words is "two hundred sixty-five million, four hundred fifty-five thousand, seven hundred eighty".