765728 has 12 divisors (see below), whose sum is σ = 1507590. Its totient is φ = 382848.

The previous prime is 765727. The next prime is 765749. The reversal of 765728 is 827567.

765728 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., 595984 + 169744 = 772^2 + 412^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (765727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11933 + ... + 11996.

2⁷⁶⁵⁷²⁸ is an apocalyptic number.

It is an amenable number.

765728 is a deficient number, since it is larger than the sum of its proper divisors (741862).

765728 is a wasteful number, since it uses less digits than its factorization.

765728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23939 (or 23931 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 765728 is about 875.0588551635. The cubic root of 765728 is about 91.4867449719.

The spelling of 765728 in words is "seven hundred sixty-five thousand, seven hundred twenty-eight".