728766719 has 8 divisors (see below), whose sum is σ = 736011360. Its totient is φ = 721536256.

The previous prime is 728766683. The next prime is 728766721. The reversal of 728766719 is 917667827.

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 728766719 - 2⁸ = 728766463 is a prime.

It is a super-2 number, since 2×728766719² = 1062201861444049922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728766749) 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, 121022 + ... + 126900.

It is an arithmetic number, because the mean of its divisors is an integer number (92001420).

Almost surely, 2^728766719 is an apocalyptic number.

728766719 is a deficient number, since it is larger than the sum of its proper divisors (7244641).

728766719 is a wasteful number, since it uses less digits than its factorization.

728766719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089.

The product of its digits is 1778112, while the sum is 53.

The square root of 728766719 is about 26995.6796358232. The cubic root of 728766719 is about 899.9039893466.

The spelling of 728766719 in words is "seven hundred twenty-eight million, seven hundred sixty-six thousand, seven hundred nineteen".