856927670 has 32 divisors (see below), whose sum is σ = 1689530400. Its totient is φ = 311481856.

The previous prime is 856927661. The next prime is 856927697. The reversal of 856927670 is 76729658.

It is a super-2 number, since 2×856927670² = 1468650063223257800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81980 + ... + 91839.

It is an arithmetic number, because the mean of its divisors is an integer number (52797825).

Almost surely, 2^856927670 is an apocalyptic number.

856927670 is a deficient number, since it is larger than the sum of its proper divisors (832602730).

856927670 is a wasteful number, since it uses less digits than its factorization.

856927670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173872.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 856927670 is about 29273.3269376748. The cubic root of 856927670 is about 949.8347524211.

The spelling of 856927670 in words is "eight hundred fifty-six million, nine hundred twenty-seven thousand, six hundred seventy".