856400178 has 16 divisors (see below), whose sum is σ = 1713182400. Its totient is φ = 285403056.

The previous prime is 856400159. The next prime is 856400179. The reversal of 856400178 is 871004658.

It is not an unprimeable number, because it can be changed into a prime (856400179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19176 + ... + 45612.

It is an arithmetic number, because the mean of its divisors is an integer number (107073900).

Almost surely, 2^856400178 is an apocalyptic number.

856400178 is an abundant number, since it is smaller than the sum of its proper divisors (856782222).

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

856400178 is a wasteful number, since it uses less digits than its factorization.

856400178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31841.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 856400178 is about 29264.3157787774. The cubic root of 856400178 is about 949.6398183985.

The spelling of 856400178 in words is "eight hundred fifty-six million, four hundred thousand, one hundred seventy-eight".