800306621728 has 24 divisors (see below), whose sum is σ = 1575653768892. Its totient is φ = 400140585216.

The previous prime is 800306621707. The next prime is 800306621731. The reversal of 800306621728 is 827126603008.

It can be written as a sum of positive squares in 2 ways, for example, as 504401084944 + 295905536784 = 710212^2 + 543972^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668226 + ... + 1430782.

Almost surely, 2^800306621728 is an apocalyptic number.

It is an amenable number.

800306621728 is a deficient number, since it is larger than the sum of its proper divisors (775347147164).

800306621728 is a wasteful number, since it uses less digits than its factorization.

800306621728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795364 (or 795356 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 800306621728 in words is "eight hundred billion, three hundred six million, six hundred twenty-one thousand, seven hundred twenty-eight".