764989944 has 16 divisors (see below), whose sum is σ = 1912474920. Its totient is φ = 254996640.

The previous prime is 764989937. The next prime is 764989993. The reversal of 764989944 is 449989467.

It is a happy number.

It is a super-2 number, since 2×764989944² = 1170419228842246272, which contains 22 as substring.

It is a congruent number.

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, 15937267 + ... + 15937314.

Almost surely, 2^764989944 is an apocalyptic number.

It is an amenable number.

764989944 is an abundant number, since it is smaller than the sum of its proper divisors (1147484976).

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

764989944 is a wasteful number, since it uses less digits than its factorization.

764989944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31874590 (or 31874586 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The square root of 764989944 is about 27658.4515835576. The cubic root of 764989944 is about 914.5734199562.

The spelling of 764989944 in words is "seven hundred sixty-four million, nine hundred eighty-nine thousand, nine hundred forty-four".