728589669 has 4 divisors (see below), whose sum is σ = 971452896. Its totient is φ = 485726444.

The previous prime is 728589623. The next prime is 728589671. The reversal of 728589669 is 966985827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 728589669 - 2⁸ = 728589413 is a prime.

It is a super-2 number, since 2×728589669² = 1061685811547059122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728589679) 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 3 ways as a sum of consecutive naturals, for example, 121431609 + ... + 121431614.

It is an arithmetic number, because the mean of its divisors is an integer number (242863224).

Almost surely, 2^728589669 is an apocalyptic number.

It is an amenable number.

728589669 is a deficient number, since it is larger than the sum of its proper divisors (242863227).

728589669 is a wasteful number, since it uses less digits than its factorization.

728589669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242863226.

The product of its digits is 13063680, while the sum is 60.

The square root of 728589669 is about 26992.4002082068. The cubic root of 728589669 is about 899.8311078142.

The spelling of 728589669 in words is "seven hundred twenty-eight million, five hundred eighty-nine thousand, six hundred sixty-nine".