809820010 has 12 divisors (see below), whose sum is σ = 1457838018. Its totient is φ = 323892008.

The previous prime is 809820001. The next prime is 809820013. The reversal of 809820010 is 10028908.

809820010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 728838009 + 80982001 = 26997^2 + 8999^2 .

It is not an unprimeable number, because it can be changed into a prime (809820013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85491 + ... + 94489.

Almost surely, 2^809820010 is an apocalyptic number.

809820010 is a deficient number, since it is larger than the sum of its proper divisors (648018008).

809820010 is an frugal number, since it uses more digits than its factorization.

809820010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005 (or 9006 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 809820010 is about 28457.3366638552. The cubic root of 809820010 is about 932.1007008962.

Adding to 809820010 its reverse (10028908), we get a palindrome (819848918).

The spelling of 809820010 in words is "eight hundred nine million, eight hundred twenty thousand, ten".