680704730 has 16 divisors (see below), whose sum is σ = 1225925064. Its totient is φ = 272136000.

The previous prime is 680704723. The next prime is 680704747. The reversal of 680704730 is 37407086.

680704730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 476243329 + 204461401 = 21823^2 + 14299^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2480 + ... + 36980.

Almost surely, 2^680704730 is an apocalyptic number.

680704730 is a deficient number, since it is larger than the sum of its proper divisors (545220334).

680704730 is a wasteful number, since it uses less digits than its factorization.

680704730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 680704730 is about 26090.3187025379. The cubic root of 680704730 is about 879.6696116835.

The spelling of 680704730 in words is "six hundred eighty million, seven hundred four thousand, seven hundred thirty".