6820438 has 8 divisors (see below), whose sum is σ = 10247688. Its totient is φ = 3404544.

The previous prime is 6820433. The next prime is 6820441. The reversal of 6820438 is 8340286.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820433) 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, 1131 + ... + 3862.

It is an arithmetic number, because the mean of its divisors is an integer number (1280961).

Almost surely, 2^6820438 is an apocalyptic number.

6820438 is a deficient number, since it is larger than the sum of its proper divisors (3427250).

6820438 is a wasteful number, since it uses less digits than its factorization.

6820438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5678.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 6820438 is about 2611.5968295279. The cubic root of 6820438 is about 189.6432641452.

The spelling of 6820438 in words is "six million, eight hundred twenty thousand, four hundred thirty-eight".