728606673806 has 64 divisors (see below), whose sum is σ = 1267917580800. Its totient is φ = 310532227200.

The previous prime is 728606673779. The next prime is 728606673811. The reversal of 728606673806 is 608376606827.

It is a happy number.

728606673806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×728606673806² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100785800 + ... + 100793028.

It is an arithmetic number, because the mean of its divisors is an integer number (19811212200).

Almost surely, 2^728606673806 is an apocalyptic number.

728606673806 is a deficient number, since it is larger than the sum of its proper divisors (539310906994).

728606673806 is a wasteful number, since it uses less digits than its factorization.

728606673806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9705.

The product of its (nonzero) digits is 24385536, while the sum is 59.

The spelling of 728606673806 in words is "seven hundred twenty-eight billion, six hundred six million, six hundred seventy-three thousand, eight hundred six".