811888130 has 16 divisors (see below), whose sum is σ = 1463219640. Its totient is φ = 324350592.

The previous prime is 811888081. The next prime is 811888169. The reversal of 811888130 is 31888118.

It can be written as a sum of positive squares in 4 ways, for example, as 699761209 + 112126921 = 26453^2 + 10589^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42089 + ... + 58268.

Almost surely, 2^811888130 is an apocalyptic number.

811888130 is a deficient number, since it is larger than the sum of its proper divisors (651331510).

811888130 is a wasteful number, since it uses less digits than its factorization.

811888130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101173.

The product of its (nonzero) digits is 12288, while the sum is 38.

The square root of 811888130 is about 28493.6506962516. The cubic root of 811888130 is about 932.8934932933.

The spelling of 811888130 in words is "eight hundred eleven million, eight hundred eighty-eight thousand, one hundred thirty".