871631634 has 8 divisors (see below), whose sum is σ = 1743263280. Its totient is φ = 290543876.

The previous prime is 871631611. The next prime is 871631653. The reversal of 871631634 is 436136178.

It is a sphenic number, since it is the product of 3 distinct primes.

871631634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 871631592 and 871631601.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72635964 + ... + 72635975.

It is an arithmetic number, because the mean of its divisors is an integer number (217907910).

Almost surely, 2^871631634 is an apocalyptic number.

871631634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

871631634 is a wasteful number, since it uses less digits than its factorization.

871631634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145271944.

The product of its digits is 72576, while the sum is 39.

The square root of 871631634 is about 29523.4082382099. The cubic root of 871631634 is about 955.2366888645.

It can be divided in two parts, 87 and 1631634, that added together give a triangular number (1631721 = T₁₈₀₆).

The spelling of 871631634 in words is "eight hundred seventy-one million, six hundred thirty-one thousand, six hundred thirty-four".