266245128 has 24 divisors (see below), whose sum is σ = 721080750. Its totient is φ = 88748352.

The previous prime is 266245123. The next prime is 266245141. The reversal of 266245128 is 821542662.

It is a happy number.

266245128 is a `hidden beast` number, since 2 + 6 + 624 + 5 + 1 + 28 = 666.

266245128 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 only one way, i.e., 147914244 + 118330884 = 12162^2 + 10878^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 266245092 and 266245101.

It is not an unprimeable number, because it can be changed into a prime (266245123) 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, 1848853 + ... + 1848996.

Almost surely, 2^266245128 is an apocalyptic number.

It is an amenable number.

266245128 is an abundant number, since it is smaller than the sum of its proper divisors (454835622).

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

266245128 is a wasteful number, since it uses less digits than its factorization.

266245128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697861 (or 3697854 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 266245128 is about 16317.0195807935. The cubic root of 266245128 is about 643.3202516125.

The spelling of 266245128 in words is "two hundred sixty-six million, two hundred forty-five thousand, one hundred twenty-eight".