811868852 has 6 divisors (see below), whose sum is σ = 1420770498. Its totient is φ = 405934424.

The previous prime is 811868821. The next prime is 811868861. The reversal of 811868852 is 258868118.

It can be written as a sum of positive squares in only one way, i.e., 645871396 + 165997456 = 25414^2 + 12884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 811868797 and 811868806.

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 as a sum of consecutive naturals, namely, 101483603 + ... + 101483610.

It is an arithmetic number, because the mean of its divisors is an integer number (236795083).

Almost surely, 2^811868852 is an apocalyptic number.

It is an amenable number.

811868852 is a deficient number, since it is larger than the sum of its proper divisors (608901646).

811868852 is a wasteful number, since it uses less digits than its factorization.

811868852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202967217 (or 202967215 counting only the distinct ones).

The product of its digits is 245760, while the sum is 47.

The square root of 811868852 is about 28493.3124083529. The cubic root of 811868852 is about 932.8861094915.

The spelling of 811868852 in words is "eight hundred eleven million, eight hundred sixty-eight thousand, eight hundred fifty-two".