3979381872 has 40 divisors (see below), whose sum is σ = 10424868480. Its totient is φ = 1307776960.

The previous prime is 3979381841. The next prime is 3979381877. The reversal of 3979381872 is 2781839793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979381877) 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, 580422 + ... + 587237.

It is an arithmetic number, because the mean of its divisors is an integer number (260621712).

Almost surely, 2^3979381872 is an apocalyptic number.

It is an amenable number.

3979381872 is an abundant number, since it is smaller than the sum of its proper divisors (6445486608).

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

3979381872 is a wasteful number, since it uses less digits than its factorization.

3979381872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167741 (or 1167735 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The square root of 3979381872 is about 63082.3419983754. The cubic root of 3979381872 is about 1584.6689157763.

The spelling of 3979381872 in words is "three billion, nine hundred seventy-nine million, three hundred eighty-one thousand, eight hundred seventy-two".