871398157788 has 120 divisors (see below), whose sum is σ = 2418213798000. Its totient is φ = 272676367872.

The previous prime is 871398157769. The next prime is 871398157801. The reversal of 871398157788 is 887751893178.

871398157788 is a `hidden beast` number, since 8 + 7 + 1 + 398 + 157 + 7 + 88 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1939263 + ... + 2345961.

It is an arithmetic number, because the mean of its divisors is an integer number (20151781650).

Almost surely, 2^871398157788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871398157788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209106899000).

871398157788 is an abundant number, since it is smaller than the sum of its proper divisors (1546815640212).

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

871398157788 is a wasteful number, since it uses less digits than its factorization.

871398157788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407121 (or 407110 counting only the distinct ones).

The product of its digits is 189665280, while the sum is 72.

The spelling of 871398157788 in words is "eight hundred seventy-one billion, three hundred ninety-eight million, one hundred fifty-seven thousand, seven hundred eighty-eight".