871016638 has 4 divisors (see below), whose sum is σ = 1306524960. Its totient is φ = 435508318.

The previous prime is 871016623. The next prime is 871016717. The reversal of 871016638 is 836610178.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 871016638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217754158 + ... + 217754161.

It is an arithmetic number, because the mean of its divisors is an integer number (326631240).

Almost surely, 2^871016638 is an apocalyptic number.

871016638 is a deficient number, since it is larger than the sum of its proper divisors (435508322).

871016638 is a wasteful number, since it uses less digits than its factorization.

871016638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435508321.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 871016638 is about 29512.9910039630. The cubic root of 871016638 is about 955.0119743023.

It can be divided in two parts, 87101 and 6638, that added together give a palindrome (93739).

The spelling of 871016638 in words is "eight hundred seventy-one million, sixteen thousand, six hundred thirty-eight".