3958391871 has 24 divisors (see below), whose sum is σ = 6559941024. Its totient is φ = 2253127680.

The previous prime is 3958391837. The next prime is 3958391897. The reversal of 3958391871 is 1781938593.

It is not a de Polignac number, because 3958391871 - 2⁶ = 3958391807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958391971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106050 + ... + 138431.

It is an arithmetic number, because the mean of its divisors is an integer number (273330876).

Almost surely, 2^3958391871 is an apocalyptic number.

3958391871 is a deficient number, since it is larger than the sum of its proper divisors (2601549153).

3958391871 is a wasteful number, since it uses less digits than its factorization.

3958391871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244751 (or 244748 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 3958391871 is about 62915.7521690713. The cubic root of 3958391871 is about 1581.8777907752.

The spelling of 3958391871 in words is "three billion, nine hundred fifty-eight million, three hundred ninety-one thousand, eight hundred seventy-one".