3989944 has 16 divisors (see below), whose sum is σ = 8550000. Its totient is φ = 1709952.

The previous prime is 3989941. The next prime is 3989957. The reversal of 3989944 is 4499893.

3989944 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3989894 and 3989903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989941) 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, 35569 + ... + 35680.

It is an arithmetic number, because the mean of its divisors is an integer number (534375).

Almost surely, 2^3989944 is an apocalyptic number.

It is an amenable number.

3989944 is an abundant number, since it is smaller than the sum of its proper divisors (4560056).

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

3989944 is a wasteful number, since it uses less digits than its factorization.

3989944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71262 (or 71258 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 3989944 is about 1997.4844179618. The cubic root of 3989944 is about 158.6069693584.

The spelling of 3989944 in words is "three million, nine hundred eighty-nine thousand, nine hundred forty-four".