871199712 has 144 divisors (see below), whose sum is σ = 2586729600. Its totient is φ = 288427392.

The previous prime is 871199711. The next prime is 871199713. The reversal of 871199712 is 217991178.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (871199711) and next prime (871199713).

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871199711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1547143 + ... + 1547705.

It is an arithmetic number, because the mean of its divisors is an integer number (17963400).

Almost surely, 2^871199712 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 871199712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293364800).

871199712 is an abundant number, since it is smaller than the sum of its proper divisors (1715529888).

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

871199712 is a wasteful number, since it uses less digits than its factorization.

871199712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 767 counting only the distinct ones).

The product of its digits is 63504, while the sum is 45.

The square root of 871199712 is about 29516.0924243031. The cubic root of 871199712 is about 955.0788791147.

The spelling of 871199712 in words is "eight hundred seventy-one million, one hundred ninety-nine thousand, seven hundred twelve".