856381696 has 81 divisors (see below), whose sum is σ = 1796784843. Its totient is φ = 407354880.

The previous prime is 856381663. The next prime is 856381697. The reversal of 856381696 is 696183658.

The square root of 856381696 is 29264.

It is a perfect power (a square), and thus also a powerful number.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856381697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14514915 + ... + 14514973.

Almost surely, 2^856381696 is an apocalyptic number.

856381696 is the 29264-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856381696

856381696 is an abundant number, since it is smaller than the sum of its proper divisors (940403147).

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

856381696 is an frugal number, since it uses more digits than its factorization.

856381696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 92 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The cubic root of 856381696 is about 949.6329869468.

The spelling of 856381696 in words is "eight hundred fifty-six million, three hundred eighty-one thousand, six hundred ninety-six".