811814728 has 32 divisors (see below), whose sum is σ = 1541030400. Its totient is φ = 400891392.

The previous prime is 811814723. The next prime is 811814737. The reversal of 811814728 is 827418118.

It is not an unprimeable number, because it can be changed into a prime (811814723) 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 7 ways as a sum of consecutive naturals, for example, 563433 + ... + 564871.

It is an arithmetic number, because the mean of its divisors is an integer number (48157200).

Almost surely, 2^811814728 is an apocalyptic number.

It is an amenable number.

811814728 is a deficient number, since it is larger than the sum of its proper divisors (729215672).

811814728 is a wasteful number, since it uses less digits than its factorization.

811814728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2265 counting only the distinct ones).

The product of its digits is 28672, while the sum is 40.

The square root of 811814728 is about 28492.3626257985. The cubic root of 811814728 is about 932.8653784544.

The spelling of 811814728 in words is "eight hundred eleven million, eight hundred fourteen thousand, seven hundred twenty-eight".