810728764 has 6 divisors (see below), whose sum is σ = 1418775344. Its totient is φ = 405364380.

The previous prime is 810728761. The next prime is 810728767. The reversal of 810728764 is 467827018.

810728764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (810728761) and next prime (810728767).

It is a super-2 number, since 2×810728764² = 1314562257553935392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 810728764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810728761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101341092 + ... + 101341099.

Almost surely, 2^810728764 is an apocalyptic number.

It is an amenable number.

810728764 is a deficient number, since it is larger than the sum of its proper divisors (608046580).

810728764 is a wasteful number, since it uses less digits than its factorization.

810728764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202682195 (or 202682193 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 810728764 is about 28473.2991414764. The cubic root of 810728764 is about 932.4492283809.

The spelling of 810728764 in words is "eight hundred ten million, seven hundred twenty-eight thousand, seven hundred sixty-four".