211983768 has 24 divisors (see below), whose sum is σ = 574122900. Its totient is φ = 70661232.

The previous prime is 211983731. The next prime is 211983773. The reversal of 211983768 is 867389112.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1472038 + ... + 1472181.

Almost surely, 2^211983768 is an apocalyptic number.

It is an amenable number.

211983768 is an abundant number, since it is smaller than the sum of its proper divisors (362139132).

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

211983768 is a wasteful number, since it uses less digits than its factorization.

211983768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944231 (or 2944224 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 211983768 is about 14559.6623587225. The cubic root of 211983768 is about 596.2579772940.

The spelling of 211983768 in words is "two hundred eleven million, nine hundred eighty-three thousand, seven hundred sixty-eight".