871695640 has 16 divisors (see below), whose sum is σ = 1961315280. Its totient is φ = 348678240.

The previous prime is 871695593. The next prime is 871695667. The reversal of 871695640 is 46596178.

It is a congruent number.

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, 10896156 + ... + 10896235.

It is an arithmetic number, because the mean of its divisors is an integer number (122582205).

Almost surely, 2^871695640 is an apocalyptic number.

It is an amenable number.

871695640 is an abundant number, since it is smaller than the sum of its proper divisors (1089619640).

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

871695640 is a wasteful number, since it uses less digits than its factorization.

871695640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21792402 (or 21792398 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 871695640 is about 29524.4922056248. The cubic root of 871695640 is about 955.2600700653.

The spelling of 871695640 in words is "eight hundred seventy-one million, six hundred ninety-five thousand, six hundred forty".