728643459 has 8 divisors (see below), whose sum is σ = 971906320. Its totient is φ = 485571456.

The previous prime is 728643401. The next prime is 728643463. The reversal of 728643459 is 954346827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728643459 - 2⁹ = 728642947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728643659) 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, 38554 + ... + 54255.

It is an arithmetic number, because the mean of its divisors is an integer number (121488290).

Almost surely, 2^728643459 is an apocalyptic number.

728643459 is a deficient number, since it is larger than the sum of its proper divisors (243262861).

728643459 is a wasteful number, since it uses less digits than its factorization.

728643459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95429.

The product of its digits is 1451520, while the sum is 48.

The square root of 728643459 is about 26993.3965813863. The cubic root of 728643459 is about 899.8532513820.

The spelling of 728643459 in words is "seven hundred twenty-eight million, six hundred forty-three thousand, four hundred fifty-nine".