856164260 has 72 divisors (see below), whose sum is σ = 2097373824. Its totient is φ = 292716480.

The previous prime is 856164229. The next prime is 856164299. The reversal of 856164260 is 62461658.

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, 421367 + ... + 423393.

It is an arithmetic number, because the mean of its divisors is an integer number (29130192).

Almost surely, 2^856164260 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 856164260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048686912).

856164260 is an abundant number, since it is smaller than the sum of its proper divisors (1241209564).

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

856164260 is a wasteful number, since it uses less digits than its factorization.

856164260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2472 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 856164260 is about 29260.2846876103. The cubic root of 856164260 is about 949.5526092846.

The spelling of 856164260 in words is "eight hundred fifty-six million, one hundred sixty-four thousand, two hundred sixty".