868686588 has 216 divisors, whose sum is σ = 2850498560. Its totient is φ = 218116800.

The previous prime is 868686569. The next prime is 868686613. The reversal of 868686588 is 885686868.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 944793 + ... + 945711.

Almost surely, 2^868686588 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 868686588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425249280).

868686588 is an abundant number, since it is smaller than the sum of its proper divisors (1981811972).

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

868686588 is a wasteful number, since it uses less digits than its factorization.

868686588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 973 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 63.

The square root of 868686588 is about 29473.4895796205. The cubic root of 868686588 is about 954.1596320562.

The spelling of 868686588 in words is "eight hundred sixty-eight million, six hundred eighty-six thousand, five hundred eighty-eight".