765624728 has 16 divisors (see below), whose sum is σ = 1566050760. Its totient is φ = 348011200.

The previous prime is 765624721. The next prime is 765624731. The reversal of 765624728 is 827426567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765624721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4350053 + ... + 4350228.

Almost surely, 2^765624728 is an apocalyptic number.

It is an amenable number.

765624728 is an abundant number, since it is smaller than the sum of its proper divisors (800426032).

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

765624728 is a wasteful number, since it uses less digits than its factorization.

765624728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8700298 (or 8700294 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 765624728 is about 27669.9246113899. The cubic root of 765624728 is about 914.8263191704.

The spelling of 765624728 in words is "seven hundred sixty-five million, six hundred twenty-four thousand, seven hundred twenty-eight".