856747008 has 132 divisors (see below), whose sum is σ = 2664506208. Its totient is φ = 263577600.

The previous prime is 856746997. The next prime is 856747009. The reversal of 856747008 is 800747658.

It is not an unprimeable number, because it can be changed into a prime (856747009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116233 + ... + 123383.

Almost surely, 2^856747008 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 856747008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332253104).

856747008 is an abundant number, since it is smaller than the sum of its proper divisors (1807759200).

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

856747008 is a wasteful number, since it uses less digits than its factorization.

856747008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7190 (or 7169 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 856747008 is about 29270.2409966163. The cubic root of 856747008 is about 949.7679980098.

The spelling of 856747008 in words is "eight hundred fifty-six million, seven hundred forty-seven thousand, eight".