810478660 has 48 divisors (see below), whose sum is σ = 1774301760. Its totient is φ = 310593920.

The previous prime is 810478657. The next prime is 810478667. The reversal of 810478660 is 66874018.

It is not an unprimeable number, because it can be changed into a prime (810478667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 70647 + ... + 81313.

It is an arithmetic number, because the mean of its divisors is an integer number (36964620).

Almost surely, 2^810478660 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 810478660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887150880).

810478660 is an abundant number, since it is smaller than the sum of its proper divisors (963823100).

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

810478660 is a wasteful number, since it uses less digits than its factorization.

810478660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10836 (or 10834 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 810478660 is about 28468.9068985797. The cubic root of 810478660 is about 932.3533338897.

The spelling of 810478660 in words is "eight hundred ten million, four hundred seventy-eight thousand, six hundred sixty".