728919569 has 8 divisors (see below), whose sum is σ = 850775808. Its totient is φ = 611494560.

The previous prime is 728919563. The next prime is 728919593. The reversal of 728919569 is 965919827.

728919569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 728919569 - 2⁸ = 728919313 is a prime.

It is a super-2 number, since 2×728919569² = 1062647476142291522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728919563) 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, 1107452 + ... + 1108109.

It is an arithmetic number, because the mean of its divisors is an integer number (106346976).

Almost surely, 2^728919569 is an apocalyptic number.

It is an amenable number.

728919569 is a deficient number, since it is larger than the sum of its proper divisors (121856239).

728919569 is a wasteful number, since it uses less digits than its factorization.

728919569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215615.

The product of its digits is 2449440, while the sum is 56.

The square root of 728919569 is about 26998.5104959514. The cubic root of 728919569 is about 899.9668996057.

The spelling of 728919569 in words is "seven hundred twenty-eight million, nine hundred nineteen thousand, five hundred sixty-nine".