3861968986 has 16 divisors (see below), whose sum is σ = 5835977064. Its totient is φ = 1916688384.

The previous prime is 3861968977. The next prime is 3861968989. The reversal of 3861968986 is 6898691683.

3861968986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3723318361 + 138650625 = 61019^2 + 11775^2 .

It is not an unprimeable number, because it can be changed into a prime (3861968989) 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, 165456 + ... + 187348.

Almost surely, 2^3861968986 is an apocalyptic number.

3861968986 is a deficient number, since it is larger than the sum of its proper divisors (1974008078).

3861968986 is a wasteful number, since it uses less digits than its factorization.

3861968986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22545.

The product of its digits is 26873856, while the sum is 64.

The square root of 3861968986 is about 62144.7422232967. The cubic root of 3861968986 is about 1568.9276875899.

The spelling of 3861968986 in words is "three billion, eight hundred sixty-one million, nine hundred sixty-eight thousand, nine hundred eighty-six".