6728831 has 4 divisors (see below), whose sum is σ = 7083000. Its totient is φ = 6374664.

The previous prime is 6728809. The next prime is 6728833. The reversal of 6728831 is 1388276.

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

It is a cyclic number.

It is not a de Polignac number, because 6728831 - 2²² = 2534527 is a prime.

It is a super-2 number, since 2×6728831² = 90554333253122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6728791 and 6728800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728833) 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, 177056 + ... + 177093.

It is an arithmetic number, because the mean of its divisors is an integer number (1770750).

Almost surely, 2^6728831 is an apocalyptic number.

6728831 is a deficient number, since it is larger than the sum of its proper divisors (354169).

6728831 is a wasteful number, since it uses less digits than its factorization.

6728831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354168.

The product of its digits is 16128, while the sum is 35.

The square root of 6728831 is about 2593.9990362373. Note that the first 3 decimals coincide. The cubic root of 6728831 is about 188.7903856393.

The spelling of 6728831 in words is "six million, seven hundred twenty-eight thousand, eight hundred thirty-one".