871988728 has 64 divisors (see below), whose sum is σ = 1795046400. Its totient is φ = 394692480.

The previous prime is 871988713. The next prime is 871988729. The reversal of 871988728 is 827889178.

It is a happy number.

It is a super-4 number, since 4×871988728⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871988729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1733325 + ... + 1733827.

It is an arithmetic number, because the mean of its divisors is an integer number (28047600).

Almost surely, 2^871988728 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 871988728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897523200).

871988728 is an abundant number, since it is smaller than the sum of its proper divisors (923057672).

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

871988728 is a wasteful number, since it uses less digits than its factorization.

871988728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 808 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 58.

The square root of 871988728 is about 29529.4552608070. The cubic root of 871988728 is about 955.3671196202.

The spelling of 871988728 in words is "eight hundred seventy-one million, nine hundred eighty-eight thousand, seven hundred twenty-eight".