871155020 has 12 divisors (see below), whose sum is σ = 1829425584. Its totient is φ = 348462000.

The previous prime is 871155007. The next prime is 871155023. The reversal of 871155020 is 20551178.

It is a super-2 number, since 2×871155020² = 1517822137742400800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (871155023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21778856 + ... + 21778895.

It is an arithmetic number, because the mean of its divisors is an integer number (152452132).

Almost surely, 2^871155020 is an apocalyptic number.

It is an amenable number.

871155020 is an abundant number, since it is smaller than the sum of its proper divisors (958270564).

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

871155020 is a wasteful number, since it uses less digits than its factorization.

871155020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43557760 (or 43557758 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 871155020 is about 29515.3353360588. The cubic root of 871155020 is about 955.0625471858.

The spelling of 871155020 in words is "eight hundred seventy-one million, one hundred fifty-five thousand, twenty".