871688 has 8 divisors (see below), whose sum is σ = 1634430. Its totient is φ = 435840.

The previous prime is 871687. The next prime is 871727. The reversal of 871688 is 886178.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 228484 = 802^2 + 478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (871681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54473 + ... + 54488.

2⁸⁷¹⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

871688 is a deficient number, since it is larger than the sum of its proper divisors (762742).

871688 is a wasteful number, since it uses less digits than its factorization.

871688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108967 (or 108963 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 871688 is about 933.6423298030. The cubic root of 871688 is about 95.5257279256.

The spelling of 871688 in words is "eight hundred seventy-one thousand, six hundred eighty-eight".