765759640 has 32 divisors (see below), whose sum is σ = 1744776000. Its totient is φ = 302425344.

The previous prime is 765759623. The next prime is 765759647. The reversal of 765759640 is 46957567.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765759647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118005 + ... + 124324.

It is an arithmetic number, because the mean of its divisors is an integer number (54524250).

Almost surely, 2^765759640 is an apocalyptic number.

It is an amenable number.

765759640 is an abundant number, since it is smaller than the sum of its proper divisors (979016360).

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

765759640 is a wasteful number, since it uses less digits than its factorization.

765759640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242419 (or 242415 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

The square root of 765759640 is about 27672.3623856005. The cubic root of 765759640 is about 914.8800503675.

The spelling of 765759640 in words is "seven hundred sixty-five million, seven hundred fifty-nine thousand, six hundred forty".