3944944128 has 40 divisors (see below), whose sum is σ = 10509581808. Its totient is φ = 1314980864.

The previous prime is 3944944123. The next prime is 3944944169. The reversal of 3944944128 is 8214494493.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (3944944123) 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 3 ways as a sum of consecutive naturals, for example, 1282626 + ... + 1285697.

Almost surely, 2^3944944128 is an apocalyptic number.

It is an amenable number.

3944944128 is an abundant number, since it is smaller than the sum of its proper divisors (6564637680).

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

3944944128 is an equidigital number, since it uses as much as digits as its factorization.

3944944128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568344 (or 2568328 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 3944944128 is about 62808.7902128357. The cubic root of 3944944128 is about 1580.0844007683.

The spelling of 3944944128 in words is "three billion, nine hundred forty-four million, nine hundred forty-four thousand, one hundred twenty-eight".