856617738 has 16 divisors (see below), whose sum is σ = 1713531456. Its totient is φ = 285489920.

The previous prime is 856617737. The next prime is 856617763. The reversal of 856617738 is 837716658.

856617738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (856617737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47995 + ... + 63377.

It is an arithmetic number, because the mean of its divisors is an integer number (107095716).

Almost surely, 2^856617738 is an apocalyptic number.

856617738 is an abundant number, since it is smaller than the sum of its proper divisors (856913718).

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

856617738 is a wasteful number, since it uses less digits than its factorization.

856617738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24669.

The product of its digits is 1693440, while the sum is 51.

The square root of 856617738 is about 29268.0326978087. The cubic root of 856617738 is about 949.7202271262.

The spelling of 856617738 in words is "eight hundred fifty-six million, six hundred seventeen thousand, seven hundred thirty-eight".