3981535968 has 48 divisors (see below), whose sum is σ = 10458032256. Its totient is φ = 1326353280.

The previous prime is 3981535919. The next prime is 3981536033. The reversal of 3981535968 is 8695351893.

3981535968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153373 + ... + 177443.

It is an arithmetic number, because the mean of its divisors is an integer number (217875672).

Almost surely, 2^3981535968 is an apocalyptic number.

It is an amenable number.

3981535968 is an abundant number, since it is smaller than the sum of its proper divisors (6476496288).

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

3981535968 is a wasteful number, since it uses less digits than its factorization.

3981535968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25807 (or 25799 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 57.

The square root of 3981535968 is about 63099.4133728674. The cubic root of 3981535968 is about 1584.9547988052.

The spelling of 3981535968 in words is "three billion, nine hundred eighty-one million, five hundred thirty-five thousand, nine hundred sixty-eight".