266818428 has 48 divisors (see below), whose sum is σ = 694515360. Its totient is φ = 88584192.

The previous prime is 266818427. The next prime is 266818459. The reversal of 266818428 is 824818662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266818427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22950 + ... + 32562.

It is an arithmetic number, because the mean of its divisors is an integer number (14469070).

Almost surely, 2^266818428 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 266818428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347257680).

266818428 is an abundant number, since it is smaller than the sum of its proper divisors (427696932).

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

266818428 is a wasteful number, since it uses less digits than its factorization.

266818428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9883 (or 9875 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 266818428 is about 16334.5776804912. The cubic root of 266818428 is about 643.7816698781.

The spelling of 266818428 in words is "two hundred sixty-six million, eight hundred eighteen thousand, four hundred twenty-eight".