856183140 has 72 divisors (see below), whose sum is σ = 2609513088. Its totient is φ = 227223360.

The previous prime is 856183117. The next prime is 856183169. The reversal of 856183140 is 41381658.

856183140 is a `hidden beast` number, since 8 + 5 + 618 + 31 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 856183095 and 856183104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26709 + ... + 49251.

Almost surely, 2^856183140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856183140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304756544).

856183140 is an abundant number, since it is smaller than the sum of its proper divisors (1753329948).

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

856183140 is a wasteful number, since it uses less digits than its factorization.

856183140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22769 (or 22764 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 856183140 is about 29260.6073074364. The cubic root of 856183140 is about 949.5595890283.

The spelling of 856183140 in words is "eight hundred fifty-six million, one hundred eighty-three thousand, one hundred forty".