728650729 has 8 divisors (see below), whose sum is σ = 762306048. Its totient is φ = 695751840.

The previous prime is 728650697. The next prime is 728650751. The reversal of 728650729 is 927056827.

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 728650729 - 2⁵ = 728650697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728650799) 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, 187137 + ... + 190990.

It is an arithmetic number, because the mean of its divisors is an integer number (95288256).

Almost surely, 2^728650729 is an apocalyptic number.

It is an amenable number.

728650729 is a deficient number, since it is larger than the sum of its proper divisors (33655319).

728650729 is a wasteful number, since it uses less digits than its factorization.

728650729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378215.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 728650729 is about 26993.5312436146. The cubic root of 728650729 is about 899.8562441175.

The spelling of 728650729 in words is "seven hundred twenty-eight million, six hundred fifty thousand, seven hundred twenty-nine".