6809838 has 32 divisors (see below), whose sum is σ = 16104960. Its totient is φ = 1878240.

The previous prime is 6809837. The next prime is 6809849. The reversal of 6809838 is 8389086.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6809838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6809833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1578 + ... + 4013.

It is an arithmetic number, because the mean of its divisors is an integer number (503280).

Almost surely, 2^6809838 is an apocalyptic number.

6809838 is an abundant number, since it is smaller than the sum of its proper divisors (9295122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6809838 is a wasteful number, since it uses less digits than its factorization.

6809838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 6809838 is about 2609.5666306879. The cubic root of 6809838 is about 189.5449683615.

The spelling of 6809838 in words is "six million, eight hundred nine thousand, eight hundred thirty-eight".