266189328 has 100 divisors (see below), whose sum is σ = 774161388. Its totient is φ = 88300800.

The previous prime is 266189323. The next prime is 266189369. The reversal of 266189328 is 823981662.

266189328 is a `hidden beast` number, since 2 + 6 + 618 + 9 + 3 + 28 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 241864704 + 24324624 = 15552^2 + 4932^2 .

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (266189321) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 379378 + ... + 380078.

Almost surely, 2^266189328 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 266189328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387080694).

266189328 is an abundant number, since it is smaller than the sum of its proper divisors (507972060).

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

266189328 is a wasteful number, since it uses less digits than its factorization.

266189328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014 (or 999 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 266189328 is about 16315.3096201083. The cubic root of 266189328 is about 643.2753058409.

The spelling of 266189328 in words is "two hundred sixty-six million, one hundred eighty-nine thousand, three hundred twenty-eight".