728871673 has 8 divisors (see below), whose sum is σ = 767481120. Its totient is φ = 690287040.

The previous prime is 728871613. The next prime is 728871683. The reversal of 728871673 is 376178827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728871673 - 2²⁵ = 695317241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728871613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113361 + ... + 119617.

It is an arithmetic number, because the mean of its divisors is an integer number (95935140).

Almost surely, 2^728871673 is an apocalyptic number.

It is an amenable number.

728871673 is a deficient number, since it is larger than the sum of its proper divisors (38609447).

728871673 is a wasteful number, since it uses less digits than its factorization.

728871673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12407.

The product of its digits is 790272, while the sum is 49.

The square root of 728871673 is about 26997.6234694834. The cubic root of 728871673 is about 899.9471874360.

It can be divided in two parts, 7288 and 71673, that added together give a square (78961 = 281²).

The spelling of 728871673 in words is "seven hundred twenty-eight million, eight hundred seventy-one thousand, six hundred seventy-three".