871787412 has 72 divisors (see below), whose sum is σ = 2332162560. Its totient is φ = 273818880.

The previous prime is 871787351. The next prime is 871787453. The reversal of 871787412 is 214787178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127308 + ... + 133980.

Almost surely, 2^871787412 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 871787412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166081280).

871787412 is an abundant number, since it is smaller than the sum of its proper divisors (1460375148).

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

871787412 is a wasteful number, since it uses less digits than its factorization.

871787412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6893 (or 6888 counting only the distinct ones).

The product of its digits is 175616, while the sum is 45.

The square root of 871787412 is about 29526.0463320100. The cubic root of 871787412 is about 955.2935921063.

The spelling of 871787412 in words is "eight hundred seventy-one million, seven hundred eighty-seven thousand, four hundred twelve".