728307613 has 8 divisors (see below), whose sum is σ = 794848320. Its totient is φ = 661822080.

The previous prime is 728307599. The next prime is 728307661. The reversal of 728307613 is 316703827.

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 728307613 - 2⁹ = 728307101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728307113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16768 + ... + 41686.

It is an arithmetic number, because the mean of its divisors is an integer number (99356040).

Almost surely, 2^728307613 is an apocalyptic number.

It is an amenable number.

728307613 is a deficient number, since it is larger than the sum of its proper divisors (66540707).

728307613 is a wasteful number, since it uses less digits than its factorization.

728307613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27587.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 728307613 is about 26987.1749725680. The cubic root of 728307613 is about 899.7149768230.

The spelling of 728307613 in words is "seven hundred twenty-eight million, three hundred seven thousand, six hundred thirteen".