810813204 has 72 divisors (see below), whose sum is σ = 2212479360. Its totient is φ = 249598272.

The previous prime is 810813187. The next prime is 810813209. The reversal of 810813204 is 402318018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810813209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7129 + ... + 40895.

It is an arithmetic number, because the mean of its divisors is an integer number (30728880).

Almost surely, 2^810813204 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 810813204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106239680).

810813204 is an abundant number, since it is smaller than the sum of its proper divisors (1401666156).

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

810813204 is a wasteful number, since it uses less digits than its factorization.

810813204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33829 (or 33824 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 810813204 is about 28474.7818955651. The cubic root of 810813204 is about 932.4815997826.

It can be divided in two parts, 8108 and 13204, that added together give a palindrome (21312).

The spelling of 810813204 in words is "eight hundred ten million, eight hundred thirteen thousand, two hundred four".