871989678 has 32 divisors (see below), whose sum is σ = 2214577920. Its totient is φ = 249139800.

The previous prime is 871989659. The next prime is 871989683. The reversal of 871989678 is 876989178.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1153048 + ... + 1153803.

It is an arithmetic number, because the mean of its divisors is an integer number (69205560).

Almost surely, 2^871989678 is an apocalyptic number.

871989678 is an abundant number, since it is smaller than the sum of its proper divisors (1342588242).

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

871989678 is a wasteful number, since it uses less digits than its factorization.

871989678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306869 (or 2306863 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The square root of 871989678 is about 29529.4713464363. The cubic root of 871989678 is about 955.3674665660.

The spelling of 871989678 in words is "eight hundred seventy-one million, nine hundred eighty-nine thousand, six hundred seventy-eight".