868859868 has 96 divisors (see below), whose sum is σ = 2251307520. Its totient is φ = 259409920.

The previous prime is 868859861. The next prime is 868859879. The reversal of 868859868 is 868958868.

It is a junction number, because it is equal to n+sod(n) for n = 868859799 and 868859808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868859861) 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, 1318123 + ... + 1318781.

It is an arithmetic number, because the mean of its divisors is an integer number (23451120).

Almost surely, 2^868859868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868859868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1125653760).

868859868 is an abundant number, since it is smaller than the sum of its proper divisors (1382447652).

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

868859868 is a wasteful number, since it uses less digits than its factorization.

868859868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 985 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 66.

The square root of 868859868 is about 29476.4290238828. The cubic root of 868859868 is about 954.2230710422.

The spelling of 868859868 in words is "eight hundred sixty-eight million, eight hundred fifty-nine thousand, eight hundred sixty-eight".