871886628 has 18 divisors (see below), whose sum is σ = 2203935734. Its totient is φ = 290628864.

The previous prime is 871886621. The next prime is 871886629. The reversal of 871886628 is 826688178.

871886628 is a `hidden beast` number, since 8 + 7 + 1 + 8 + 8 + 6 + 628 = 666.

It can be written as a sum of positive squares in only one way, i.e., 840884004 + 31002624 = 28998^2 + 5568^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (871886621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12109501 + ... + 12109572.

Almost surely, 2^871886628 is an apocalyptic number.

It is an amenable number.

871886628 is an abundant number, since it is smaller than the sum of its proper divisors (1332049106).

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

871886628 is a wasteful number, since it uses less digits than its factorization.

871886628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24219083 (or 24219078 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 871886628 is about 29527.7264278847. The cubic root of 871886628 is about 955.3298306098.

The spelling of 871886628 in words is "eight hundred seventy-one million, eight hundred eighty-six thousand, six hundred twenty-eight".