856308705 has 16 divisors (see below), whose sum is σ = 1565821824. Its totient is φ = 391455360.

The previous prime is 856308679. The next prime is 856308707. The reversal of 856308705 is 507803658.

856308705 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856308705 - 2⁶ = 856308641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856308707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4077556 + ... + 4077765.

It is an arithmetic number, because the mean of its divisors is an integer number (97863864).

Almost surely, 2^856308705 is an apocalyptic number.

It is an amenable number.

856308705 is a deficient number, since it is larger than the sum of its proper divisors (709513119).

856308705 is a wasteful number, since it uses less digits than its factorization.

856308705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8155336.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 856308705 is about 29262.7528609323. The cubic root of 856308705 is about 949.6060065201.

The spelling of 856308705 in words is "eight hundred fifty-six million, three hundred eight thousand, seven hundred five".