211028818 has 64 divisors (see below), whose sum is σ = 443584512. Its totient is φ = 72578880.

The previous prime is 211028813. The next prime is 211028819. The reversal of 211028818 is 818820112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 211028818.

It is not an unprimeable number, because it can be changed into a prime (211028813) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 43755 + ... + 48337.

It is an arithmetic number, because the mean of its divisors is an integer number (6931008).

Almost surely, 2^211028818 is an apocalyptic number.

211028818 is an abundant number, since it is smaller than the sum of its proper divisors (232555694).

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

211028818 is a wasteful number, since it uses less digits than its factorization.

211028818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4639.

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 211028818 is about 14526.8309689347. The cubic root of 211028818 is about 595.3612833035.

The spelling of 211028818 in words is "two hundred eleven million, twenty-eight thousand, eight hundred eighteen".