728982665 has 16 divisors (see below), whose sum is σ = 897731856. Its totient is φ = 567936000.

The previous prime is 728982659. The next prime is 728982689. The reversal of 728982665 is 566289827.

728982665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 105431824 + 623550841 = 10268^2 + 24971^2 .

It is not a de Polignac number, because 728982665 - 2⁶ = 728982601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122765 + ... + 128565.

It is an arithmetic number, because the mean of its divisors is an integer number (56108241).

Almost surely, 2^728982665 is an apocalyptic number.

It is an amenable number.

728982665 is a deficient number, since it is larger than the sum of its proper divisors (168749191).

728982665 is a wasteful number, since it uses less digits than its factorization.

728982665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460.

The product of its digits is 2903040, while the sum is 53.

The square root of 728982665 is about 26999.6789795731. The cubic root of 728982665 is about 899.9928661986.

The spelling of 728982665 in words is "seven hundred twenty-eight million, nine hundred eighty-two thousand, six hundred sixty-five".