3999838 has 16 divisors (see below), whose sum is σ = 6337440. Its totient is φ = 1889536.

The previous prime is 3999803. The next prime is 3999851. The reversal of 3999838 is 8389993.

3999838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3999791 and 3999800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606 + ... + 4582.

It is an arithmetic number, because the mean of its divisors is an integer number (396090).

Almost surely, 2^3999838 is an apocalyptic number.

3999838 is a deficient number, since it is larger than the sum of its proper divisors (2337602).

3999838 is a wasteful number, since it uses less digits than its factorization.

3999838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its digits is 419904, while the sum is 49.

The square root of 3999838 is about 1999.9594995899. The cubic root of 3999838 is about 158.7379621765.

The spelling of 3999838 in words is "three million, nine hundred ninety-nine thousand, eight hundred thirty-eight".