3944609944 has 64 divisors (see below), whose sum is σ = 8178278400. Its totient is φ = 1768752000.

The previous prime is 3944609939. The next prime is 3944609947. The reversal of 3944609944 is 4499064493.

It is a super-2 number, since 2×3944609944² = 31119895220607366272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3944609891 and 3944609900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944609947) 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, 3083497 + ... + 3084775.

It is an arithmetic number, because the mean of its divisors is an integer number (127785600).

Almost surely, 2^3944609944 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 3944609944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4089139200).

3944609944 is an abundant number, since it is smaller than the sum of its proper divisors (4233668456).

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

3944609944 is a wasteful number, since it uses less digits than its factorization.

3944609944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 52.

The square root of 3944609944 is about 62806.1298282262. The cubic root of 3944609944 is about 1580.0397821527.

It can be divided in two parts, 394460 and 9944, that added together give a palindrome (404404).

The spelling of 3944609944 in words is "three billion, nine hundred forty-four million, six hundred nine thousand, nine hundred forty-four".