3993986 has 8 divisors (see below), whose sum is σ = 6004044. Its totient is φ = 1992640.

The previous prime is 3993959. The next prime is 3993991. The reversal of 3993986 is 6893993.

3993986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3728761 + 265225 = 1931^2 + 515^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 3993986.

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 3 ways as a sum of consecutive naturals, for example, 875 + ... + 2958.

Almost surely, 2^3993986 is an apocalyptic number.

3993986 is a deficient number, since it is larger than the sum of its proper divisors (2010058).

3993986 is a wasteful number, since it uses less digits than its factorization.

3993986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356.

The product of its digits is 314928, while the sum is 47.

The square root of 3993986 is about 1998.4959344467. The cubic root of 3993986 is about 158.6605100437.

The spelling of 3993986 in words is "three million, nine hundred ninety-three thousand, nine hundred eighty-six".