856838634 has 8 divisors (see below), whose sum is σ = 1713677280. Its totient is φ = 285612876.

The previous prime is 856838599. The next prime is 856838657. The reversal of 856838634 is 436838658.

It is a sphenic number, since it is the product of 3 distinct primes.

856838634 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71403214 + ... + 71403225.

It is an arithmetic number, because the mean of its divisors is an integer number (214209660).

Almost surely, 2^856838634 is an apocalyptic number.

856838634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

856838634 is a wasteful number, since it uses less digits than its factorization.

856838634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142806444.

The product of its digits is 3317760, while the sum is 51.

The square root of 856838634 is about 29271.8061280817. The cubic root of 856838634 is about 949.8018548892.

The spelling of 856838634 in words is "eight hundred fifty-six million, eight hundred thirty-eight thousand, six hundred thirty-four".