871866220 has 24 divisors (see below), whose sum is σ = 1834761600. Its totient is φ = 348014592.

The previous prime is 871866217. The next prime is 871866223. The reversal of 871866220 is 22668178.

It is an interprime number because it is at equal distance from previous prime (871866217) and next prime (871866223).

It is not an unprimeable number, because it can be changed into a prime (871866223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35925 + ... + 55084.

It is an arithmetic number, because the mean of its divisors is an integer number (76448400).

Almost surely, 2^871866220 is an apocalyptic number.

It is an amenable number.

871866220 is an abundant number, since it is smaller than the sum of its proper divisors (962895380).

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

871866220 is a wasteful number, since it uses less digits than its factorization.

871866220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91497 (or 91495 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 871866220 is about 29527.3808523546. The cubic root of 871866220 is about 955.3223768413.

The spelling of 871866220 in words is "eight hundred seventy-one million, eight hundred sixty-six thousand, two hundred twenty".