6728641 has 4 divisors (see below), whose sum is σ = 7082800. Its totient is φ = 6374484.

The previous prime is 6728639. The next prime is 6728653. The reversal of 6728641 is 1468276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6728641 - 2¹ = 6728639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6728597 and 6728606.

It is not an unprimeable number, because it can be changed into a prime (6728041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177051 + ... + 177088.

It is an arithmetic number, because the mean of its divisors is an integer number (1770700).

Almost surely, 2^6728641 is an apocalyptic number.

It is an amenable number.

6728641 is a deficient number, since it is larger than the sum of its proper divisors (354159).

6728641 is a wasteful number, since it uses less digits than its factorization.

6728641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354158.

The product of its digits is 16128, while the sum is 34.

The square root of 6728641 is about 2593.9624129891. The cubic root of 6728641 is about 188.7886086832.

The spelling of 6728641 in words is "six million, seven hundred twenty-eight thousand, six hundred forty-one".