811211418 has 48 divisors (see below), whose sum is σ = 1772971200. Its totient is φ = 268056000.

The previous prime is 811211407. The next prime is 811211419. The reversal of 811211418 is 814112118.

It is a junction number, because it is equal to n+sod(n) for n = 811211391 and 811211400.

It is not an unprimeable number, because it can be changed into a prime (811211419) 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 23 ways as a sum of consecutive naturals, for example, 1847643 + ... + 1848081.

It is an arithmetic number, because the mean of its divisors is an integer number (36936900).

Almost surely, 2^811211418 is an apocalyptic number.

811211418 is an abundant number, since it is smaller than the sum of its proper divisors (961759782).

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

811211418 is a wasteful number, since it uses less digits than its factorization.

811211418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1104 counting only the distinct ones).

The product of its digits is 512, while the sum is 27.

The square root of 811211418 is about 28481.7734349531. The cubic root of 811211418 is about 932.6342310967.

The spelling of 811211418 in words is "eight hundred eleven million, two hundred eleven thousand, four hundred eighteen".