3904839 has 12 divisors (see below), whose sum is σ = 5664672. Its totient is φ = 2592000.

The previous prime is 3904829. The next prime is 3904877. The reversal of 3904839 is 9384093.

It is not a de Polignac number, because 3904839 - 2¹⁹ = 3380551 is a prime.

3904839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3904829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1639 + ... + 3239.

It is an arithmetic number, because the mean of its divisors is an integer number (472056).

Almost surely, 2^3904839 is an apocalyptic number.

3904839 is a deficient number, since it is larger than the sum of its proper divisors (1759833).

3904839 is a wasteful number, since it uses less digits than its factorization.

3904839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878 (or 1875 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3904839 is about 1976.0665474624. The cubic root of 3904839 is about 157.4711663014.

The spelling of 3904839 in words is "three million, nine hundred four thousand, eight hundred thirty-nine".