813993852 has 48 divisors (see below), whose sum is σ = 2180263680. Its totient is φ = 231539712.

The previous prime is 813993841. The next prime is 813993853. The reversal of 813993852 is 258399318.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813993853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2277 + ... + 40412.

It is an arithmetic number, because the mean of its divisors is an integer number (45422160).

Almost surely, 2^813993852 is an apocalyptic number.

It is an amenable number.

813993852 is an abundant number, since it is smaller than the sum of its proper divisors (1366269828).

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

813993852 is a wasteful number, since it uses less digits than its factorization.

813993852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42930 (or 42928 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 813993852 is about 28530.5774915265. The cubic root of 813993852 is about 933.6993179769.

The spelling of 813993852 in words is "eight hundred thirteen million, nine hundred ninety-three thousand, eight hundred fifty-two".