211868268 has 12 divisors (see below), whose sum is σ = 494359320. Its totient is φ = 70622752.

The previous prime is 211868243. The next prime is 211868299. The reversal of 211868268 is 862868112.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8827833 + ... + 8827856.

It is an arithmetic number, because the mean of its divisors is an integer number (41196610).

Almost surely, 2^211868268 is an apocalyptic number.

It is an amenable number.

211868268 is an abundant number, since it is smaller than the sum of its proper divisors (282491052).

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

211868268 is a wasteful number, since it uses less digits than its factorization.

211868268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17655696 (or 17655694 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 211868268 is about 14555.6953801596. The cubic root of 211868268 is about 596.1496666303.

The spelling of 211868268 in words is "two hundred eleven million, eight hundred sixty-eight thousand, two hundred sixty-eight".