861289068 has 24 divisors (see below), whose sum is σ = 2011686768. Its totient is φ = 286808896.

The previous prime is 861289063. The next prime is 861289069. The reversal of 861289068 is 860982168.

It is not an unprimeable number, because it can be changed into a prime (861289063) 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, 23271 + ... + 47582.

It is an arithmetic number, because the mean of its divisors is an integer number (83820282).

Almost surely, 2^861289068 is an apocalyptic number.

It is an amenable number.

861289068 is an abundant number, since it is smaller than the sum of its proper divisors (1150397700).

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

861289068 is a wasteful number, since it uses less digits than its factorization.

861289068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71873 (or 71871 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 861289068 is about 29347.7267944214. The cubic root of 861289068 is about 951.4434448471.

The spelling of 861289068 in words is "eight hundred sixty-one million, two hundred eighty-nine thousand, sixty-eight".