856223340 has 192 divisors, whose sum is σ = 2820787200. Its totient is φ = 190024704.

The previous prime is 856223339. The next prime is 856223341. The reversal of 856223340 is 43322658.

It is a happy number.

856223340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856223339) and next prime (856223341).

It is not an unprimeable number, because it can be changed into a prime (856223341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2700862 + ... + 2701178.

It is an arithmetic number, because the mean of its divisors is an integer number (14691600).

Almost surely, 2^856223340 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 856223340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410393600).

856223340 is an abundant number, since it is smaller than the sum of its proper divisors (1964563860).

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

856223340 is a wasteful number, since it uses less digits than its factorization.

856223340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 856223340 is about 29261.2942297500. The cubic root of 856223340 is about 949.5744502172.

Adding to 856223340 its reverse (43322658), we get a palindrome (899545998).

The spelling of 856223340 in words is "eight hundred fifty-six million, two hundred twenty-three thousand, three hundred forty".