728013668 has 12 divisors (see below), whose sum is σ = 1274997612. Its totient is φ = 363728640.

The previous prime is 728013659. The next prime is 728013673. The reversal of 728013668 is 866310827.

It is a happy number.

728013668 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 2 ways, for example, as 326091364 + 401922304 = 18058^2 + 20048^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63605 + ... + 74172.

It is an arithmetic number, because the mean of its divisors is an integer number (106249801).

Almost surely, 2^728013668 is an apocalyptic number.

It is an amenable number.

728013668 is a deficient number, since it is larger than the sum of its proper divisors (546983944).

728013668 is a wasteful number, since it uses less digits than its factorization.

728013668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139102 (or 139100 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 728013668 is about 26981.7284101668. The cubic root of 728013668 is about 899.5939188608.

The spelling of 728013668 in words is "seven hundred twenty-eight million, thirteen thousand, six hundred sixty-eight".