861931882 has 8 divisors (see below), whose sum is σ = 1477597536. Its totient is φ = 369399372.

The previous prime is 861931867. The next prime is 861931883. The reversal of 861931882 is 288139168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (861931883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30783268 + ... + 30783295.

It is an arithmetic number, because the mean of its divisors is an integer number (184699692).

Almost surely, 2^861931882 is an apocalyptic number.

861931882 is a deficient number, since it is larger than the sum of its proper divisors (615665654).

861931882 is a wasteful number, since it uses less digits than its factorization.

861931882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61566572.

The product of its digits is 165888, while the sum is 46.

The square root of 861931882 is about 29358.6764347441. The cubic root of 861931882 is about 951.6800859077.

The spelling of 861931882 in words is "eight hundred sixty-one million, nine hundred thirty-one thousand, eight hundred eighty-two".