265280128 has 48 divisors (see below), whose sum is σ = 557864010. Its totient is φ = 125637120.

The previous prime is 265280123. The next prime is 265280129. The reversal of 265280128 is 821082562.

It can be written as a sum of positive squares in only one way, i.e., 226442304 + 38837824 = 15048^2 + 6232^2 .

It is a junction number, because it is equal to n+sod(n) for n = 265280093 and 265280102.

It is not an unprimeable number, because it can be changed into a prime (265280123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43338 + ... + 49078.

Almost surely, 2^265280128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265280128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278932005).

265280128 is an abundant number, since it is smaller than the sum of its proper divisors (292583882).

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

265280128 is an equidigital number, since it uses as much as digits as its factorization.

265280128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793 (or 5762 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 265280128 is about 16287.4223866148. The cubic root of 265280128 is about 642.5420770134.

The spelling of 265280128 in words is "two hundred sixty-five million, two hundred eighty thousand, one hundred twenty-eight".