8871439920 has 80 divisors (see below), whose sum is σ = 31430250240. Its totient is φ = 2027757312.

The previous prime is 8871439879. The next prime is 8871439921. The reversal of 8871439920 is 299341788.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (8871439921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2638630 + ... + 2641989.

It is an arithmetic number, because the mean of its divisors is an integer number (392878128).

Almost surely, 2^8871439920 is an apocalyptic number.

8871439920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8871439920 is an abundant number, since it is smaller than the sum of its proper divisors (22558810320).

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

8871439920 is a wasteful number, since it uses less digits than its factorization.

8871439920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280642 (or 5280636 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 8871439920 is about 94188.3215690778. The cubic root of 8871439920 is about 2070.1319993307.

The spelling of 8871439920 in words is "eight billion, eight hundred seventy-one million, four hundred thirty-nine thousand, nine hundred twenty".