3944889 has 16 divisors (see below), whose sum is σ = 6294400. Its totient is φ = 2427408.

The previous prime is 3944881. The next prime is 3944909. The reversal of 3944889 is 9884493.

It is a happy number.

It is not a de Polignac number, because 3944889 - 2³ = 3944881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3944881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5269 + ... + 5970.

It is an arithmetic number, because the mean of its divisors is an integer number (393400).

Almost surely, 2^3944889 is an apocalyptic number.

3944889 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3944889 is a deficient number, since it is larger than the sum of its proper divisors (2349511).

3944889 is a wasteful number, since it uses less digits than its factorization.

3944889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11261 (or 11255 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 3944889 is about 1986.1744636361. The cubic root of 3944889 is about 158.0077040521.

The spelling of 3944889 in words is "three million, nine hundred forty-four thousand, eight hundred eighty-nine".