856670 has 8 divisors (see below), whose sum is σ = 1542024. Its totient is φ = 342664.

The previous prime is 856649. The next prime is 856693. The reversal of 856670 is 76658.

856670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

856670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42824 + ... + 42843.

It is an arithmetic number, because the mean of its divisors is an integer number (192753).

2⁸⁵⁶⁶⁷⁰ is an apocalyptic number.

856670 is a deficient number, since it is larger than the sum of its proper divisors (685354).

856670 is a wasteful number, since it uses less digits than its factorization.

856670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85674.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 856670 is about 925.5646924986. The cubic root of 856670 is about 94.9739540785.

The spelling of 856670 in words is "eight hundred fifty-six thousand, six hundred seventy".