3936639 has 16 divisors (see below), whose sum is σ = 6352128. Its totient is φ = 2116992.

The previous prime is 3936631. The next prime is 3936641. The reversal of 3936639 is 9366393.

It is not a de Polignac number, because 3936639 - 2³ = 3936631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3936597 and 3936606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3936631) 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 15 ways as a sum of consecutive naturals, for example, 5157 + ... + 5870.

It is an arithmetic number, because the mean of its divisors is an integer number (397008).

Almost surely, 2^3936639 is an apocalyptic number.

3936639 is a deficient number, since it is larger than the sum of its proper divisors (2415489).

3936639 is a wasteful number, since it uses less digits than its factorization.

3936639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054.

The product of its digits is 78732, while the sum is 39.

The square root of 3936639 is about 1984.0965198296. The cubic root of 3936639 is about 157.8974792915.

The spelling of 3936639 in words is "three million, nine hundred thirty-six thousand, six hundred thirty-nine".