265078980 has 84 divisors (see below), whose sum is σ = 834662892. Its totient is φ = 70683840.

The previous prime is 265078973. The next prime is 265078999. The reversal of 265078980 is 89870562.

265078980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 186650244 + 78428736 = 13662^2 + 8856^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5490 + ... + 23670.

It is an arithmetic number, because the mean of its divisors is an integer number (9936463).

Almost surely, 2^265078980 is an apocalyptic number.

265078980 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 265078980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417331446).

265078980 is an abundant number, since it is smaller than the sum of its proper divisors (569583912).

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

265078980 is a wasteful number, since it uses less digits than its factorization.

265078980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18208 (or 18191 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 265078980 is about 16281.2462667942. The cubic root of 265078980 is about 642.3796339697.

The spelling of 265078980 in words is "two hundred sixty-five million, seventy-eight thousand, nine hundred eighty".