860843664 has 60 divisors (see below), whose sum is σ = 2419600716. Its totient is φ = 285705216.

The previous prime is 860843653. The next prime is 860843693. The reversal of 860843664 is 466348068.

860843664 is a `hidden beast` number, since 8 + 608 + 4 + 36 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216090000 + 644753664 = 14700^2 + 25392^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20724 + ... + 46380.

Almost surely, 2^860843664 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 860843664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209800358).

860843664 is an abundant number, since it is smaller than the sum of its proper divisors (1558757052).

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

860843664 is a wasteful number, since it uses less digits than its factorization.

860843664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25904 (or 25895 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 860843664 is about 29340.1374229911. The cubic root of 860843664 is about 951.2794078615.

The spelling of 860843664 in words is "eight hundred sixty million, eight hundred forty-three thousand, six hundred sixty-four".