3944989 has 8 divisors (see below), whose sum is σ = 4171040. Its totient is φ = 3720816.

The previous prime is 3944987. The next prime is 3944999. The reversal of 3944989 is 9894493.

3944989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3944989 - 2¹ = 3944987 is a prime.

It is a Duffinian number.

3944989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7282 + ... + 7804.

It is an arithmetic number, because the mean of its divisors is an integer number (521380).

Almost surely, 2^3944989 is an apocalyptic number.

It is an amenable number.

3944989 is a deficient number, since it is larger than the sum of its proper divisors (226051).

3944989 is a wasteful number, since it uses less digits than its factorization.

3944989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939.

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

The square root of 3944989 is about 1986.1996374987. The cubic root of 3944989 is about 158.0090391667.

It can be divided in two parts, 39 and 44989, that multiplied together give a palindrome (1754571).

The spelling of 3944989 in words is "three million, nine hundred forty-four thousand, nine hundred eighty-nine".