856212860 has 12 divisors (see below), whose sum is σ = 1798047048. Its totient is φ = 342485136.

The previous prime is 856212859. The next prime is 856212887. The reversal of 856212860 is 68212658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21405302 + ... + 21405341.

It is an arithmetic number, because the mean of its divisors is an integer number (149837254).

Almost surely, 2^856212860 is an apocalyptic number.

It is an amenable number.

856212860 is an abundant number, since it is smaller than the sum of its proper divisors (941834188).

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

856212860 is a wasteful number, since it uses less digits than its factorization.

856212860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42810652 (or 42810650 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 856212860 is about 29261.1151530491. The cubic root of 856212860 is about 949.5705760019.

The spelling of 856212860 in words is "eight hundred fifty-six million, two hundred twelve thousand, eight hundred sixty".