211936728 has 16 divisors (see below), whose sum is σ = 529841880. Its totient is φ = 70645568.

The previous prime is 211936721. The next prime is 211936741. The reversal of 211936728 is 827639112.

211936728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211936721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4415325 + ... + 4415372.

Almost surely, 2^211936728 is an apocalyptic number.

It is an amenable number.

211936728 is an abundant number, since it is smaller than the sum of its proper divisors (317905152).

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

211936728 is a wasteful number, since it uses less digits than its factorization.

211936728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830706 (or 8830702 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 211936728 is about 14558.0468470190. The cubic root of 211936728 is about 596.2138700644.

The spelling of 211936728 in words is "two hundred eleven million, nine hundred thirty-six thousand, seven hundred twenty-eight".