764803640 has 16 divisors (see below), whose sum is σ = 1720808280. Its totient is φ = 305921440.

The previous prime is 764803597. The next prime is 764803649. The reversal of 764803640 is 46308467.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 764803594 and 764803603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764803649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9560006 + ... + 9560085.

Almost surely, 2^764803640 is an apocalyptic number.

It is an amenable number.

764803640 is an abundant number, since it is smaller than the sum of its proper divisors (956004640).

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

764803640 is a wasteful number, since it uses less digits than its factorization.

764803640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19120102 (or 19120098 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 764803640 is about 27655.0834386736. The cubic root of 764803640 is about 914.4991695160.

The spelling of 764803640 in words is "seven hundred sixty-four million, eight hundred three thousand, six hundred forty".