730688660 has 24 divisors (see below), whose sum is σ = 1652481096. Its totient is φ = 269792640.

The previous prime is 730688639. The next prime is 730688671. The reversal of 730688660 is 66886037.

730688660 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 25361296 + 705327364 = 5036^2 + 26558^2 .

It is a congruent 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, 1404911 + ... + 1405430.

It is an arithmetic number, because the mean of its divisors is an integer number (68853379).

Almost surely, 2^730688660 is an apocalyptic number.

It is an amenable number.

730688660 is an abundant number, since it is smaller than the sum of its proper divisors (921792436).

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

730688660 is a wasteful number, since it uses less digits than its factorization.

730688660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810363 (or 2810361 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 730688660 is about 27031.2533930634. The cubic root of 730688660 is about 900.6943859265.

The spelling of 730688660 in words is "seven hundred thirty million, six hundred eighty-eight thousand, six hundred sixty".