6820406 has 4 divisors (see below), whose sum is σ = 10230612. Its totient is φ = 3410202.

The previous prime is 6820393. The next prime is 6820421. The reversal of 6820406 is 6040286.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705100 + ... + 1705103.

It is an arithmetic number, because the mean of its divisors is an integer number (2557653).

Almost surely, 2^6820406 is an apocalyptic number.

6820406 is a deficient number, since it is larger than the sum of its proper divisors (3410206).

6820406 is a wasteful number, since it uses less digits than its factorization.

6820406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410205.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6820406 is about 2611.5907030008. The cubic root of 6820406 is about 189.6429675566.

The spelling of 6820406 in words is "six million, eight hundred twenty thousand, four hundred six".