856425894 has 32 divisors (see below), whose sum is σ = 1727475936. Its totient is φ = 283046400.

The previous prime is 856425833. The next prime is 856425919. The reversal of 856425894 is 498524658.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712494 + ... + 713694.

It is an arithmetic number, because the mean of its divisors is an integer number (53983623).

Almost surely, 2^856425894 is an apocalyptic number.

856425894 is an abundant number, since it is smaller than the sum of its proper divisors (871050042).

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

856425894 is a wasteful number, since it uses less digits than its factorization.

856425894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120.

The product of its digits is 2764800, while the sum is 51.

The square root of 856425894 is about 29264.7551501802. The cubic root of 856425894 is about 949.6493235706.

The spelling of 856425894 in words is "eight hundred fifty-six million, four hundred twenty-five thousand, eight hundred ninety-four".