871872550 has 24 divisors (see below), whose sum is σ = 1623547872. Its totient is φ = 348348000.

The previous prime is 871872517. The next prime is 871872577. The reversal of 871872550 is 55278178.

It is a junction number, because it is equal to n+sod(n) for n = 871872497 and 871872506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35980 + ... + 55120.

It is an arithmetic number, because the mean of its divisors is an integer number (67647828).

Almost surely, 2^871872550 is an apocalyptic number.

871872550 is a deficient number, since it is larger than the sum of its proper divisors (751675322).

871872550 is a wasteful number, since it uses less digits than its factorization.

871872550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20064 (or 20059 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 871872550 is about 29527.4880408070. The cubic root of 871872550 is about 955.3246888076.

The spelling of 871872550 in words is "eight hundred seventy-one million, eight hundred seventy-two thousand, five hundred fifty".