868505868 has 48 divisors (see below), whose sum is σ = 2274004320.
Its totient is φ = 286632000.
The previous prime is 868505851. The next prime is 868505879.
868505868 is a `hidden beast` number, since 8 + 6 + 8 + 50 + 586 + 8 = 666.
868505868 is nontrivially palindromic in base 10.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28903 + ... + 50718.
It is an arithmetic number, because the mean of its divisors is an integer number (47375090).
Almost surely, 2868505868 is an apocalyptic number.
It is an amenable number.
868505868 is an abundant number, since it is smaller than the sum of its proper divisors (1405498452).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
868505868 is a wasteful number, since it uses less digits than its factorization.
868505868 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 79735 (or 79727 counting only the distinct ones).
The product of its (nonzero) digits is 3686400, while the sum is 54.
The square root of 868505868 is about 29470.4236141933.
The cubic root of 868505868 is about 954.0934602476.
The spelling of 868505868 in words is "eight hundred sixty-eight million, five hundred five thousand, eight hundred sixty-eight".