868585869 has 32 divisors (see below), whose sum is σ = 1386086400. Its totient is φ = 536001840.

The previous prime is 868585849. The next prime is 868585903. The reversal of 868585869 is 968585868.

868585869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 868585869 - 2²¹ = 866488717 is a prime.

It is a super-2 number, since 2×868585869² = 1508882823652970322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868585819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3309 + ... + 41810.

It is an arithmetic number, because the mean of its divisors is an integer number (43315200).

Almost surely, 2^868585869 is an apocalyptic number.

It is an amenable number.

868585869 is a deficient number, since it is larger than the sum of its proper divisors (517500531).

868585869 is a wasteful number, since it uses less digits than its factorization.

868585869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45182 (or 45176 counting only the distinct ones).

The product of its digits is 33177600, while the sum is 63.

The square root of 868585869 is about 29471.7808929152. The cubic root of 868585869 is about 954.1227542686.

Subtracting 868585869 from its reverse (968585868), we obtain a palindrome (99999999).

The spelling of 868585869 in words is "eight hundred sixty-eight million, five hundred eighty-five thousand, eight hundred sixty-nine".