3994839 has 20 divisors (see below), whose sum is σ = 6025800. Its totient is φ = 2637360.

The previous prime is 3994817. The next prime is 3994841. The reversal of 3994839 is 9384993.

It is not a de Polignac number, because 3994839 - 2²⁰ = 2946263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3994794 and 3994803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994849) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11904 + ... + 12234.

It is an arithmetic number, because the mean of its divisors is an integer number (301290).

Almost surely, 2^3994839 is an apocalyptic number.

3994839 is a deficient number, since it is larger than the sum of its proper divisors (2030961).

3994839 is a wasteful number, since it uses less digits than its factorization.

3994839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 483 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 3994839 is about 1998.7093335450. The cubic root of 3994839 is about 158.6718043398.

The spelling of 3994839 in words is "three million, nine hundred ninety-four thousand, eight hundred thirty-nine".