266528238 has 16 divisors (see below), whose sum is σ = 561112320. Its totient is φ = 84166776.

The previous prime is 266528221. The next prime is 266528239. The reversal of 266528238 is 832825662.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 266528238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266528239) 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 7 ways as a sum of consecutive naturals, for example, 1168870 + ... + 1169097.

It is an arithmetic number, because the mean of its divisors is an integer number (35069520).

Almost surely, 2^266528238 is an apocalyptic number.

266528238 is an abundant number, since it is smaller than the sum of its proper divisors (294584082).

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

266528238 is a wasteful number, since it uses less digits than its factorization.

266528238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337991.

The product of its digits is 276480, while the sum is 42.

The square root of 266528238 is about 16325.6925733642. The cubic root of 266528238 is about 643.5481942860.

It can be divided in two parts, 2665 and 28238, that added together give a palindrome (30903).

The spelling of 266528238 in words is "two hundred sixty-six million, five hundred twenty-eight thousand, two hundred thirty-eight".