851860680 has 128 divisors (see below), whose sum is σ = 2795627520. Its totient is φ = 205940480.

The previous prime is 851860673. The next prime is 851860697. The reversal of 851860680 is 86068158.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663319 + ... + 664601.

It is an arithmetic number, because the mean of its divisors is an integer number (21840840).

Almost surely, 2^851860680 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 851860680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397813760).

851860680 is an abundant number, since it is smaller than the sum of its proper divisors (1943766840).

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

851860680 is a wasteful number, since it uses less digits than its factorization.

851860680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1807 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 851860680 is about 29186.6524288072. The cubic root of 851860680 is about 947.9589346452.

The spelling of 851860680 in words is "eight hundred fifty-one million, eight hundred sixty thousand, six hundred eighty".