864186680 has 64 divisors (see below), whose sum is σ = 2227530240. Its totient is φ = 295581312.

The previous prime is 864186649. The next prime is 864186691. The reversal of 864186680 is 86681468.

It is a congruent number.

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, 120557 + ... + 127523.

It is an arithmetic number, because the mean of its divisors is an integer number (34805160).

Almost surely, 2^864186680 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 864186680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113765120).

864186680 is an abundant number, since it is smaller than the sum of its proper divisors (1363343560).

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

864186680 is a wasteful number, since it uses less digits than its factorization.

864186680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7428 (or 7424 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 864186680 is about 29397.0522331747. The cubic root of 864186680 is about 952.5092225440.

The spelling of 864186680 in words is "eight hundred sixty-four million, one hundred eighty-six thousand, six hundred eighty".