865071868 has 24 divisors (see below), whose sum is σ = 1543782240. Its totient is φ = 424075200.

The previous prime is 865071863. The next prime is 865071869. The reversal of 865071868 is 868170568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865071863) 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, 31218 + ... + 52006.

It is an arithmetic number, because the mean of its divisors is an integer number (64324260).

Almost surely, 2^865071868 is an apocalyptic number.

It is an amenable number.

865071868 is a deficient number, since it is larger than the sum of its proper divisors (678710372).

865071868 is a wasteful number, since it uses less digits than its factorization.

865071868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20997 (or 20995 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 865071868 is about 29412.1041069829. The cubic root of 865071868 is about 952.8343305470.

The spelling of 865071868 in words is "eight hundred sixty-five million, seventy-one thousand, eight hundred sixty-eight".