3986844 has 24 divisors (see below), whose sum is σ = 9409680. Its totient is φ = 1313664.

The previous prime is 3986839. The next prime is 3986897. The reversal of 3986844 is 4486893.

It is a d-powerful number, because it can be written as 3¹¹ + 9² + 8⁵ + 6⁸ + 8⁷ + 4² + 4³ .

It is a junction number, because it is equal to n+sod(n) for n = 3986796 and 3986805.

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 in 7 ways as a sum of consecutive naturals, for example, 799 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (392070).

Almost surely, 2^3986844 is an apocalyptic number.

It is an amenable number.

3986844 is an abundant number, since it is smaller than the sum of its proper divisors (5422836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3986844 is a wasteful number, since it uses less digits than its factorization.

3986844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829 (or 3827 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 3986844 is about 1996.7082911632. The cubic root of 3986844 is about 158.5658819816.

The spelling of 3986844 in words is "three million, nine hundred eighty-six thousand, eight hundred forty-four".