728655073 has 8 divisors (see below), whose sum is σ = 793454400. Its totient is φ = 666500688.

The previous prime is 728655061. The next prime is 728655079. The reversal of 728655073 is 370556827.

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 728655073 - 2⁵ = 728655041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728655079) 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, 660661 + ... + 661762.

It is an arithmetic number, because the mean of its divisors is an integer number (99181800).

Almost surely, 2^728655073 is an apocalyptic number.

It is an amenable number.

728655073 is a deficient number, since it is larger than the sum of its proper divisors (64799327).

728655073 is a wasteful number, since it uses less digits than its factorization.

728655073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322471.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 728655073 is about 26993.6117072170. The cubic root of 728655073 is about 899.8580323394.

The spelling of 728655073 in words is "seven hundred twenty-eight million, six hundred fifty-five thousand, seventy-three".