728018439 has 8 divisors (see below), whose sum is σ = 971241600. Its totient is φ = 485070456.

The previous prime is 728018413. The next prime is 728018443. The reversal of 728018439 is 934810827.

728018439 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 not a de Polignac number, because 728018439 - 2²⁸ = 459582983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728018439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728014439) 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, 62539 + ... + 73260.

It is an arithmetic number, because the mean of its divisors is an integer number (121405200).

Almost surely, 2^728018439 is an apocalyptic number.

728018439 is a deficient number, since it is larger than the sum of its proper divisors (243223161).

728018439 is a wasteful number, since it uses less digits than its factorization.

728018439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137589.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 728018439 is about 26981.8168217042. The cubic root of 728018439 is about 899.5958840040.

The spelling of 728018439 in words is "seven hundred twenty-eight million, eighteen thousand, four hundred thirty-nine".