856842156 has 18 divisors (see below), whose sum is σ = 2165906652. Its totient is φ = 285614040.

The previous prime is 856842127. The next prime is 856842167. The reversal of 856842156 is 651248658.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11900550 + ... + 11900621.

Almost surely, 2^856842156 is an apocalyptic number.

It is an amenable number.

856842156 is an abundant number, since it is smaller than the sum of its proper divisors (1309064496).

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

856842156 is a wasteful number, since it uses less digits than its factorization.

856842156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23801181 (or 23801176 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 856842156 is about 29271.8662882981. The cubic root of 856842156 is about 949.8031562613.

The spelling of 856842156 in words is "eight hundred fifty-six million, eight hundred forty-two thousand, one hundred fifty-six".