764307765 has 32 divisors (see below), whose sum is σ = 1463293440. Its totient is φ = 376273728.

The previous prime is 764307721. The next prime is 764307767. The reversal of 764307765 is 567703467.

It is not a de Polignac number, because 764307765 - 2⁷ = 764307637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 764307765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764307767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 215997 + ... + 219506.

It is an arithmetic number, because the mean of its divisors is an integer number (45727920).

Almost surely, 2^764307765 is an apocalyptic number.

It is an amenable number.

764307765 is a deficient number, since it is larger than the sum of its proper divisors (698985675).

764307765 is a wasteful number, since it uses less digits than its factorization.

764307765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435530 (or 435524 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The square root of 764307765 is about 27646.1166350719. The cubic root of 764307765 is about 914.3014824696.

The spelling of 764307765 in words is "seven hundred sixty-four million, three hundred seven thousand, seven hundred sixty-five".