6728687 has 4 divisors (see below), whose sum is σ = 7689936. Its totient is φ = 5767440.

The previous prime is 6728663. The next prime is 6728713. The reversal of 6728687 is 7868276.

It is a happy number.

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

It is not a de Polignac number, because 6728687 - 2¹⁰ = 6727663 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6722687) 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, 480614 + ... + 480627.

It is an arithmetic number, because the mean of its divisors is an integer number (1922484).

Almost surely, 2^6728687 is an apocalyptic number.

6728687 is a deficient number, since it is larger than the sum of its proper divisors (961249).

6728687 is an equidigital number, since it uses as much as digits as its factorization.

6728687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961248.

The product of its digits is 225792, while the sum is 44.

The square root of 6728687 is about 2593.9712797176. The cubic root of 6728687 is about 188.7890388967.

The spelling of 6728687 in words is "six million, seven hundred twenty-eight thousand, six hundred eighty-seven".