728345559 has 4 divisors (see below), whose sum is σ = 971127416. Its totient is φ = 485563704.

The previous prime is 728345507. The next prime is 728345561. The reversal of 728345559 is 955543827.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 728345559 - 2⁹ = 728345047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728345599) 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 3 ways as a sum of consecutive naturals, for example, 121390924 + ... + 121390929.

It is an arithmetic number, because the mean of its divisors is an integer number (242781854).

Almost surely, 2^728345559 is an apocalyptic number.

728345559 is a deficient number, since it is larger than the sum of its proper divisors (242781857).

728345559 is a wasteful number, since it uses less digits than its factorization.

728345559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242781856.

The product of its digits is 1512000, while the sum is 48.

The square root of 728345559 is about 26987.8780010582. The cubic root of 728345559 is about 899.7306020849.

The spelling of 728345559 in words is "seven hundred twenty-eight million, three hundred forty-five thousand, five hundred fifty-nine".