856986552 has 96 divisors (see below), whose sum is σ = 2352430080. Its totient is φ = 281828160.

The previous prime is 856986527. The next prime is 856986577. The reversal of 856986552 is 255689658.

856986552 is a `hidden beast` number, since 8 + 5 + 6 + 9 + 86 + 552 = 666.

It is an interprime number because it is at equal distance from previous prime (856986527) and next prime (856986577).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3162177 + ... + 3162447.

It is an arithmetic number, because the mean of its divisors is an integer number (24504480).

Almost surely, 2^856986552 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 856986552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176215040).

856986552 is an abundant number, since it is smaller than the sum of its proper divisors (1495443528).

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

856986552 is a wasteful number, since it uses less digits than its factorization.

856986552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 706 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 856986552 is about 29274.3326482432. The cubic root of 856986552 is about 949.8565072284.

The spelling of 856986552 in words is "eight hundred fifty-six million, nine hundred eighty-six thousand, five hundred fifty-two".