871213806 has 24 divisors (see below), whose sum is σ = 1957543224. Its totient is φ = 290404440.

The previous prime is 871213799. The next prime is 871213813. The reversal of 871213806 is 608312178.

It is an interprime number because it is at equal distance from previous prime (871213799) and next prime (871213813).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 895825 + ... + 896796.

It is an arithmetic number, because the mean of its divisors is an integer number (81564301).

Almost surely, 2^871213806 is an apocalyptic number.

871213806 is an abundant number, since it is smaller than the sum of its proper divisors (1086329418).

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

871213806 is a wasteful number, since it uses less digits than its factorization.

871213806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792638 (or 1792626 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 871213806 is about 29516.3311744532. The cubic root of 871213806 is about 955.0840294107.

The spelling of 871213806 in words is "eight hundred seventy-one million, two hundred thirteen thousand, eight hundred six".