3986439 has 8 divisors (see below), whose sum is σ = 5346672. Its totient is φ = 2641920.

The previous prime is 3986431. The next prime is 3986441. The reversal of 3986439 is 9346893.

3986439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3986439 - 2³ = 3986431 is a prime.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 3986439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986431) by changing a digit.

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, 3322 + ... + 4359.

It is an arithmetic number, because the mean of its divisors is an integer number (668334).

Almost surely, 2^3986439 is an apocalyptic number.

3986439 is a deficient number, since it is larger than the sum of its proper divisors (1360233).

3986439 is a wasteful number, since it uses less digits than its factorization.

3986439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857.

The product of its digits is 139968, while the sum is 42.

The square root of 3986439 is about 1996.6068716700. The cubic root of 3986439 is about 158.5605125418.

It can be divided in two parts, 39864 and 39, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 3986439 in words is "three million, nine hundred eighty-six thousand, four hundred thirty-nine".