3921944 has 32 divisors (see below), whose sum is σ = 8112720. Its totient is φ = 1766016.

The previous prime is 3921941. The next prime is 3921949. The reversal of 3921944 is 4491293.

It is a happy number.

3921944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3921944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921941) 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, 4034 + ... + 4910.

Almost surely, 2^3921944 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 3921944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4056360).

3921944 is an abundant number, since it is smaller than the sum of its proper divisors (4190776).

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

3921944 is a wasteful number, since it uses less digits than its factorization.

3921944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 935 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 3921944 is about 1980.3898606083. The cubic root of 3921944 is about 157.7007635485.

The spelling of 3921944 in words is "three million, nine hundred twenty-one thousand, nine hundred forty-four".