764228928 has 28 divisors (see below), whose sum is σ = 2022022880. Its totient is φ = 254742912.

The previous prime is 764228917. The next prime is 764228929. The reversal of 764228928 is 829822467.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764228929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989988 + ... + 1990371.

Almost surely, 2^764228928 is an apocalyptic number.

It is an amenable number.

764228928 is an abundant number, since it is smaller than the sum of its proper divisors (1257793952).

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

764228928 is a wasteful number, since it uses less digits than its factorization.

764228928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980374 (or 3980364 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 764228928 is about 27644.6907741794. The cubic root of 764228928 is about 914.2700451928.

The spelling of 764228928 in words is "seven hundred sixty-four million, two hundred twenty-eight thousand, nine hundred twenty-eight".