266289728 has 28 divisors (see below), whose sum is σ = 528972780. Its totient is φ = 133005312.

The previous prime is 266289719. The next prime is 266289739. The reversal of 266289728 is 827982662.

266289728 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 89718784 + 176570944 = 9472^2 + 13288^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88700 + ... + 91652.

It is an arithmetic number, because the mean of its divisors is an integer number (18891885).

Almost surely, 2^266289728 is an apocalyptic number.

It is an amenable number.

266289728 is a deficient number, since it is larger than the sum of its proper divisors (262683052).

266289728 is a wasteful number, since it uses less digits than its factorization.

266289728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374 (or 4364 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 266289728 is about 16318.3861947191. The cubic root of 266289728 is about 643.3561714951.

The spelling of 266289728 in words is "two hundred sixty-six million, two hundred eighty-nine thousand, seven hundred twenty-eight".