928640802728 has 16 divisors (see below), whose sum is σ = 1757175832500. Its totient is φ = 460060580736.

The previous prime is 928640802721. The next prime is 928640802767. The reversal of 928640802728 is 827208046829.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 906003192964 + 22637609764 = 951842^2 + 150458^2 .

It is not an unprimeable number, because it can be changed into a prime (928640802721) 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, 532476653 + ... + 532478396.

Almost surely, 2^928640802728 is an apocalyptic number.

It is an amenable number.

928640802728 is a deficient number, since it is larger than the sum of its proper divisors (828535029772).

928640802728 is a wasteful number, since it uses less digits than its factorization.

928640802728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064955164 (or 1064955160 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 928640802728 in words is "nine hundred twenty-eight billion, six hundred forty million, eight hundred two thousand, seven hundred twenty-eight".