3996686 has 4 divisors (see below), whose sum is σ = 5995032. Its totient is φ = 1998342.

The previous prime is 3996653. The next prime is 3996743. The reversal of 3996686 is 6866993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6866993 = 7 ⋅980999.

It is a self number, because there is not a number n which added to its sum of digits gives 3996686.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 999170 + ... + 999173.

It is an arithmetic number, because the mean of its divisors is an integer number (1498758).

Almost surely, 2^3996686 is an apocalyptic number.

3996686 is a deficient number, since it is larger than the sum of its proper divisors (1998346).

3996686 is a wasteful number, since it uses less digits than its factorization.

3996686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998345.

The product of its digits is 419904, while the sum is 47.

The square root of 3996686 is about 1999.1713283258. The cubic root of 3996686 is about 158.6962543587.

The spelling of 3996686 in words is "three million, nine hundred ninety-six thousand, six hundred eighty-six".