266128896 has 160 divisors (see below), whose sum is σ = 815126400. Its totient is φ = 76308480.

The previous prime is 266128843. The next prime is 266128921. The reversal of 266128896 is 698821662.

It is a happy number.

266128896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

Its product of digits (497664) is a multiple of the sum of its prime divisors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320610 + ... + 321438.

It is an arithmetic number, because the mean of its divisors is an integer number (5094540).

Almost surely, 2^266128896 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 266128896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407563200).

266128896 is an abundant number, since it is smaller than the sum of its proper divisors (548997504).

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

266128896 is a wasteful number, since it uses less digits than its factorization.

266128896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 864 counting only the distinct ones).

The product of its digits is 497664, while the sum is 48.

The square root of 266128896 is about 16313.4575121278. The cubic root of 266128896 is about 643.2266220015.

The spelling of 266128896 in words is "two hundred sixty-six million, one hundred twenty-eight thousand, eight hundred ninety-six".