856082520 has 160 divisors (see below), whose sum is σ = 2896827120. Its totient is φ = 226748160.

The previous prime is 856082483. The next prime is 856082527. The reversal of 856082520 is 25280658.

856082520 is a `hidden beast` number, since 8 + 5 + 608 + 25 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856082527) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 527310 + ... + 528930.

Almost surely, 2^856082520 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 856082520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448413560).

856082520 is an abundant number, since it is smaller than the sum of its proper divisors (2040744600).

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

856082520 is a wasteful number, since it uses less digits than its factorization.

856082520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 856082520 is about 29258.8878804373. The cubic root of 856082520 is about 949.5223896549.

The spelling of 856082520 in words is "eight hundred fifty-six million, eighty-two thousand, five hundred twenty".