6828639 has 8 divisors (see below), whose sum is σ = 9229872. Its totient is φ = 4489920.

The previous prime is 6828623. The next prime is 6828641. The reversal of 6828639 is 9368286.

6828639 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6828639 - 2⁴ = 6828623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6828639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6828139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15372 + ... + 15809.

It is an arithmetic number, because the mean of its divisors is an integer number (1153734).

Almost surely, 2^6828639 is an apocalyptic number.

6828639 is a deficient number, since it is larger than the sum of its proper divisors (2401233).

6828639 is a wasteful number, since it uses less digits than its factorization.

6828639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31257.

The product of its digits is 124416, while the sum is 42.

The square root of 6828639 is about 2613.1664700130. The cubic root of 6828639 is about 189.7192436971.

The spelling of 6828639 in words is "six million, eight hundred twenty-eight thousand, six hundred thirty-nine".