728455859 has 8 divisors (see below), whose sum is σ = 732719040. Its totient is φ = 724204800.

The previous prime is 728455799. The next prime is 728455883. The reversal of 728455859 is 958554827.

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 728455859 - 2¹⁶ = 728390323 is a prime.

It is a super-2 number, since 2×728455859² = 1061295877022855762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728455859.

It is not an unprimeable number, because it can be changed into a prime (728455759) 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, 135299 + ... + 140579.

It is an arithmetic number, because the mean of its divisors is an integer number (91589880).

Almost surely, 2^728455859 is an apocalyptic number.

728455859 is a deficient number, since it is larger than the sum of its proper divisors (4263181).

728455859 is a wasteful number, since it uses less digits than its factorization.

728455859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061.

The product of its digits is 4032000, while the sum is 53.

The square root of 728455859 is about 26989.9214337500. The cubic root of 728455859 is about 899.7760179250.

The spelling of 728455859 in words is "seven hundred twenty-eight million, four hundred fifty-five thousand, eight hundred fifty-nine".