856780970 has 16 divisors (see below), whose sum is σ = 1548354528. Its totient is φ = 341346000.

The previous prime is 856780963. The next prime is 856780973. The reversal of 856780970 is 79087658.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (856780973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168164 + ... + 173183.

It is an arithmetic number, because the mean of its divisors is an integer number (96772158).

Almost surely, 2^856780970 is an apocalyptic number.

856780970 is a deficient number, since it is larger than the sum of its proper divisors (691573558).

856780970 is a wasteful number, since it uses less digits than its factorization.

856780970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341605.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 856780970 is about 29270.8211364150. The cubic root of 856780970 is about 949.7805476478.

The spelling of 856780970 in words is "eight hundred fifty-six million, seven hundred eighty thousand, nine hundred seventy".