3869944 has 32 divisors (see below), whose sum is σ = 7902720. Its totient is φ = 1766016.

The previous prime is 3869917. The next prime is 3869959. The reversal of 3869944 is 4499683.

It is a self number, because there is not a number n which added to its sum of digits gives 3869944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13062 + ... + 13354.

It is an arithmetic number, because the mean of its divisors is an integer number (246960).

Almost surely, 2^3869944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3869944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3951360).

3869944 is an abundant number, since it is smaller than the sum of its proper divisors (4032776).

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

3869944 is a wasteful number, since it uses less digits than its factorization.

3869944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 435 counting only the distinct ones).

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

The square root of 3869944 is about 1967.2173240392. The cubic root of 3869944 is about 157.0006896801. Note that the first 3 decimals are identical.

The spelling of 3869944 in words is "three million, eight hundred sixty-nine thousand, nine hundred forty-four".