811031730 has 32 divisors (see below), whose sum is σ = 1948247424. Its totient is φ = 216078336.

The previous prime is 811031713. The next prime is 811031743. The reversal of 811031730 is 37130118.

811031730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 811031730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22867 + ... + 46313.

It is an arithmetic number, because the mean of its divisors is an integer number (60882732).

Almost surely, 2^811031730 is an apocalyptic number.

811031730 is an abundant number, since it is smaller than the sum of its proper divisors (1137215694).

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

811031730 is a wasteful number, since it uses less digits than its factorization.

811031730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24610.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 811031730 is about 28478.6188218460. The cubic root of 811031730 is about 932.5653647276.

Adding to 811031730 its reverse (37130118), we get a palindrome (848161848).

The spelling of 811031730 in words is "eight hundred eleven million, thirty-one thousand, seven hundred thirty".