856427572 has 96 divisors (see below), whose sum is σ = 2032128000. Its totient is φ = 304974720.

The previous prime is 856427549. The next prime is 856427587. The reversal of 856427572 is 275724658.

856427572 is a modest number, since divided by 427572 gives 856 as remainder.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 427429 + ... + 429427.

It is an arithmetic number, because the mean of its divisors is an integer number (21168000).

Almost surely, 2^856427572 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 856427572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016064000).

856427572 is an abundant number, since it is smaller than the sum of its proper divisors (1175700428).

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

856427572 is a wasteful number, since it uses less digits than its factorization.

856427572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141 (or 2139 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 856427572 is about 29264.7838194647. The cubic root of 856427572 is about 949.6499437879.

The spelling of 856427572 in words is "eight hundred fifty-six million, four hundred twenty-seven thousand, five hundred seventy-two".