3944440 has 32 divisors (see below), whose sum is σ = 9164160. Its totient is φ = 1526400.

The previous prime is 3944429. The next prime is 3944441. The reversal of 3944440 is 444493.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3944399 and 3944408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351 + ... + 2830.

It is an arithmetic number, because the mean of its divisors is an integer number (286380).

Almost surely, 2^3944440 is an apocalyptic number.

It is an amenable number.

3944440 is an abundant number, since it is smaller than the sum of its proper divisors (5219720).

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

3944440 is a wasteful number, since it uses less digits than its factorization.

3944440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 3944440 is about 1986.0614290600. The cubic root of 3944440 is about 158.0017091093.

The spelling of 3944440 in words is "three million, nine hundred forty-four thousand, four hundred forty".