6728631 has 32 divisors (see below), whose sum is σ = 11289600. Its totient is φ = 3542112.

The previous prime is 6728591. The next prime is 6728639. The reversal of 6728631 is 1368276.

It is not a de Polignac number, because 6728631 - 2⁷ = 6728503 is a prime.

It is a super-2 number, since 2×6728631² = 90548950268322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6728592 and 6728601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6728639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13126 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (352800).

Almost surely, 2^6728631 is an apocalyptic number.

6728631 is a deficient number, since it is larger than the sum of its proper divisors (4560969).

6728631 is a wasteful number, since it uses less digits than its factorization.

6728631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 526 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 6728631 is about 2593.9604854354. The cubic root of 6728631 is about 188.7885151583.

The spelling of 6728631 in words is "six million, seven hundred twenty-eight thousand, six hundred thirty-one".