3886639 has 4 divisors (see below), whose sum is σ = 3916440. Its totient is φ = 3856840.

The previous prime is 3886637. The next prime is 3886643. The reversal of 3886639 is 9366883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9366883 = 37 ⋅253159.

It is a cyclic number.

It is not a de Polignac number, because 3886639 - 2¹ = 3886637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3886595 and 3886604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3886637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14704 + ... + 14965.

It is an arithmetic number, because the mean of its divisors is an integer number (979110).

Almost surely, 2^3886639 is an apocalyptic number.

3886639 is a deficient number, since it is larger than the sum of its proper divisors (29801).

3886639 is a wasteful number, since it uses less digits than its factorization.

3886639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29800.

The product of its digits is 186624, while the sum is 43.

The square root of 3886639 is about 1971.4560608849. The cubic root of 3886639 is about 157.2261336252.

The spelling of 3886639 in words is "three million, eight hundred eighty-six thousand, six hundred thirty-nine".