871511380 has 48 divisors (see below), whose sum is σ = 1937295360. Its totient is φ = 328406400.

The previous prime is 871511359. The next prime is 871511413. The reversal of 871511380 is 83115178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62445 + ... + 75115.

It is an arithmetic number, because the mean of its divisors is an integer number (40360320).

Almost surely, 2^871511380 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 871511380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968647680).

871511380 is an abundant number, since it is smaller than the sum of its proper divisors (1065783980).

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

871511380 is a wasteful number, since it uses less digits than its factorization.

871511380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12880 (or 12878 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 34.

The square root of 871511380 is about 29521.3715806024. The cubic root of 871511380 is about 955.1927573413.

The spelling of 871511380 in words is "eight hundred seventy-one million, five hundred eleven thousand, three hundred eighty".