728655579 has 6 divisors (see below), whose sum is σ = 1052502516. Its totient is φ = 485770380.

The previous prime is 728655563. The next prime is 728655583. The reversal of 728655579 is 975556827.

728655579 is a `hidden beast` number, since 7 + 2 + 8 + 65 + 5 + 579 = 666.

It is not a de Polignac number, because 728655579 - 2⁴ = 728655563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728655079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40480857 + ... + 40480874.

It is an arithmetic number, because the mean of its divisors is an integer number (175417086).

Almost surely, 2^728655579 is an apocalyptic number.

728655579 is a deficient number, since it is larger than the sum of its proper divisors (323846937).

728655579 is a wasteful number, since it uses less digits than its factorization.

728655579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80961737 (or 80961734 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 54.

The square root of 728655579 is about 26993.6210798033. The cubic root of 728655579 is about 899.8582406356.

The spelling of 728655579 in words is "seven hundred twenty-eight million, six hundred fifty-five thousand, five hundred seventy-nine".