6728323449 has 16 divisors (see below), whose sum is σ = 9103052160. Its totient is φ = 4419649920.

The previous prime is 6728323411. The next prime is 6728323457. The reversal of 6728323449 is 9443238276.

It is not a de Polignac number, because 6728323449 - 2²³ = 6719934841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6728323398 and 6728323407.

It is not an unprimeable number, because it can be changed into a prime (6728323949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372229 + ... + 389885.

It is an arithmetic number, because the mean of its divisors is an integer number (568940760).

Almost surely, 2^6728323449 is an apocalyptic number.

It is an amenable number.

6728323449 is a deficient number, since it is larger than the sum of its proper divisors (2374728711).

6728323449 is a wasteful number, since it uses less digits than its factorization.

6728323449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19520.

The product of its digits is 1741824, while the sum is 48.

The square root of 6728323449 is about 82026.3582575747. The cubic root of 6728323449 is about 1887.8563874449.

The spelling of 6728323449 in words is "six billion, seven hundred twenty-eight million, three hundred twenty-three thousand, four hundred forty-nine".