728660853 has 10 divisors (see below), whose sum is σ = 1088493494. Its totient is φ = 485773848.

The previous prime is 728660839. The next prime is 728660893. The reversal of 728660853 is 358066827.

It can be written as a sum of positive squares in only one way, i.e., 490976964 + 237683889 = 22158^2 + 15417^2 .

It is not a de Polignac number, because 728660853 - 2⁴ = 728660837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 728660799 and 728660808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728660813) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4497826 + ... + 4497987.

Almost surely, 2^728660853 is an apocalyptic number.

It is an amenable number.

728660853 is a deficient number, since it is larger than the sum of its proper divisors (359832641).

728660853 is an equidigital number, since it uses as much as digits as its factorization.

728660853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8995825 (or 8995816 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 728660853 is about 26993.7187693730. The cubic root of 728660853 is about 899.8604116846.

The spelling of 728660853 in words is "seven hundred twenty-eight million, six hundred sixty thousand, eight hundred fifty-three".