3958871686 has 64 divisors (see below), whose sum is σ = 7645446144. Its totient is φ = 1492646400.

The previous prime is 3958871677. The next prime is 3958871689. The reversal of 3958871686 is 6861788593.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958871689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 799410 + ... + 804346.

It is an arithmetic number, because the mean of its divisors is an integer number (119460096).

Almost surely, 2^3958871686 is an apocalyptic number.

3958871686 is a deficient number, since it is larger than the sum of its proper divisors (3686574458).

3958871686 is a wasteful number, since it uses less digits than its factorization.

3958871686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125.

The product of its digits is 17418240, while the sum is 61.

The square root of 3958871686 is about 62919.5652082880. The cubic root of 3958871686 is about 1581.9417037691.

The spelling of 3958871686 in words is "three billion, nine hundred fifty-eight million, eight hundred seventy-one thousand, six hundred eighty-six".