871405980 has 48 divisors (see below), whose sum is σ = 2441456640. Its totient is φ = 232230208.

The previous prime is 871405973. The next prime is 871406021. The reversal of 871405980 is 89504178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121741 + ... + 128699.

It is an arithmetic number, because the mean of its divisors is an integer number (50863680).

Almost surely, 2^871405980 is an apocalyptic number.

It is an amenable number.

871405980 is an abundant number, since it is smaller than the sum of its proper divisors (1570050660).

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

871405980 is a wasteful number, since it uses less digits than its factorization.

871405980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058 (or 9056 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 871405980 is about 29519.5863792161. The cubic root of 871405980 is about 955.1542489991.

The spelling of 871405980 in words is "eight hundred seventy-one million, four hundred five thousand, nine hundred eighty".