860857984 has 128 divisors (see below), whose sum is σ = 2102342400. Its totient is φ = 343056384.

The previous prime is 860857927. The next prime is 860858071. The reversal of 860857984 is 489758068.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 761932 + ... + 763060.

It is an arithmetic number, because the mean of its divisors is an integer number (16424550).

Almost surely, 2^860857984 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 860857984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051171200).

860857984 is an abundant number, since it is smaller than the sum of its proper divisors (1241484416).

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

860857984 is a wasteful number, since it uses less digits than its factorization.

860857984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 860857984 is about 29340.3814562797. The cubic root of 860857984 is about 951.2846826271.

The spelling of 860857984 in words is "eight hundred sixty million, eight hundred fifty-seven thousand, nine hundred eighty-four".