871857252 has 36 divisors (see below), whose sum is σ = 2518699456. Its totient is φ = 249102000.

The previous prime is 871857229. The next prime is 871857253. The reversal of 871857252 is 252758178.

871857252 is a `hidden beast` number, since 8 + 71 + 8 + 572 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 871857198 and 871857207.

It is not an unprimeable number, because it can be changed into a prime (871857253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1729624 + ... + 1730127.

Almost surely, 2^871857252 is an apocalyptic number.

It is an amenable number.

871857252 is an abundant number, since it is smaller than the sum of its proper divisors (1646842204).

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

871857252 is a wasteful number, since it uses less digits than its factorization.

871857252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459768 (or 3459763 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 871857252 is about 29527.2289929143. The cubic root of 871857252 is about 955.3191013539.

The spelling of 871857252 in words is "eight hundred seventy-one million, eight hundred fifty-seven thousand, two hundred fifty-two".