3867805986 has 32 divisors (see below), whose sum is σ = 8441928000. Its totient is φ = 1171634880.

The previous prime is 3867805967. The next prime is 3867805993. The reversal of 3867805986 is 6895087683.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204040 + ... + 222188.

It is an arithmetic number, because the mean of its divisors is an integer number (263810250).

Almost surely, 2^3867805986 is an apocalyptic number.

3867805986 is an abundant number, since it is smaller than the sum of its proper divisors (4574122014).

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

3867805986 is a wasteful number, since it uses less digits than its factorization.

3867805986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21394.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The square root of 3867805986 is about 62191.6874348976. The cubic root of 3867805986 is about 1569.7177181921.

The spelling of 3867805986 in words is "three billion, eight hundred sixty-seven million, eight hundred five thousand, nine hundred eighty-six".