871323840 has 168 divisors, whose sum is σ = 3028858560. Its totient is φ = 229883904.

The previous prime is 871323829. The next prime is 871323847. The reversal of 871323840 is 48323178.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 871323795 and 871323804.

It is not an unprimeable number, because it can be changed into a prime (871323847) 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, 277801 + ... + 280919.

It is an arithmetic number, because the mean of its divisors is an integer number (18028920).

Almost surely, 2^871323840 is an apocalyptic number.

871323840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 871323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1514429280).

871323840 is an abundant number, since it is smaller than the sum of its proper divisors (2157534720).

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

871323840 is a wasteful number, since it uses less digits than its factorization.

871323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239 (or 3226 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 871323840 is about 29518.1950667720. The cubic root of 871323840 is about 955.1242366447.

The spelling of 871323840 in words is "eight hundred seventy-one million, three hundred twenty-three thousand, eight hundred forty".