860705872 has 40 divisors (see below), whose sum is σ = 1800344840. Its totient is φ = 396264960.

The previous prime is 860705863. The next prime is 860705887. The reversal of 860705872 is 278507068.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5494336 + 855211536 = 2344^2 + 29244^2 .

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 7 ways as a sum of consecutive naturals, for example, 82654 + ... + 92482.

It is an arithmetic number, because the mean of its divisors is an integer number (45008621).

Almost surely, 2^860705872 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 860705872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900172420).

860705872 is an abundant number, since it is smaller than the sum of its proper divisors (939638968).

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

860705872 is a wasteful number, since it uses less digits than its factorization.

860705872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271 (or 10265 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 860705872 is about 29337.7891464234. The cubic root of 860705872 is about 951.2286492503.

The spelling of 860705872 in words is "eight hundred sixty million, seven hundred five thousand, eight hundred seventy-two".