3921444 has 18 divisors (see below), whose sum is σ = 9912630. Its totient is φ = 1307136.

The previous prime is 3921413. The next prime is 3921451. The reversal of 3921444 is 4441293.

It can be written as a sum of positive squares in only one way, i.e., 3132900 + 788544 = 1770^2 + 888^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54429 + ... + 54500.

Almost surely, 2^3921444 is an apocalyptic number.

It is an amenable number.

3921444 is an abundant number, since it is smaller than the sum of its proper divisors (5991186).

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

3921444 is a wasteful number, since it uses less digits than its factorization.

3921444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108939 (or 108934 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 3921444 is about 1980.2636188144. The cubic root of 3921444 is about 157.6940616227.

The spelling of 3921444 in words is "three million, nine hundred twenty-one thousand, four hundred forty-four".