728456459 has 4 divisors (see below), whose sum is σ = 728617800. Its totient is φ = 728295120.

The previous prime is 728456453. The next prime is 728456461. The reversal of 728456459 is 954654827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728456459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728456453) 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, 73697 + ... + 82994.

It is an arithmetic number, because the mean of its divisors is an integer number (182154450).

Almost surely, 2^728456459 is an apocalyptic number.

728456459 is a deficient number, since it is larger than the sum of its proper divisors (161341).

728456459 is a wasteful number, since it uses less digits than its factorization.

728456459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161340.

The product of its digits is 2419200, while the sum is 50.

The square root of 728456459 is about 26989.9325490080. The cubic root of 728456459 is about 899.7762649614.

The spelling of 728456459 in words is "seven hundred twenty-eight million, four hundred fifty-six thousand, four hundred fifty-nine".