810516852 has 18 divisors (see below), whose sum is σ = 2048806578. Its totient is φ = 270172272.

The previous prime is 810516841. The next prime is 810516881. The reversal of 810516852 is 258615018.

It can be written as a sum of positive squares in only one way, i.e., 740057616 + 70459236 = 27204^2 + 8394^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 22514357 = 810516852 / (8 + 1 + 0 + 5 + 1 + 6 + 8 + 5 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11257143 + ... + 11257214.

Almost surely, 2^810516852 is an apocalyptic number.

It is an amenable number.

810516852 is an abundant number, since it is smaller than the sum of its proper divisors (1238289726).

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

810516852 is a wasteful number, since it uses less digits than its factorization.

810516852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22514367 (or 22514362 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 810516852 is about 28469.5776575628. The cubic root of 810516852 is about 932.3679786837.

The spelling of 810516852 in words is "eight hundred ten million, five hundred sixteen thousand, eight hundred fifty-two".