212028 has 12 divisors (see below), whose sum is σ = 494760. Its totient is φ = 70672.

The previous prime is 211997. The next prime is 212029. The reversal of 212028 is 820212.

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

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 211998 and 212016.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 212028.

It is not an unprimeable number, because it can be changed into a prime (212029) by changing a digit.

212028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8823 + ... + 8846.

It is an arithmetic number, because the mean of its divisors is an integer number (41230).

2²¹²⁰²⁸ is an apocalyptic number.

It is an amenable number.

212028 is an abundant number, since it is smaller than the sum of its proper divisors (282732).

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

212028 is a wasteful number, since it uses less digits than its factorization.

212028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17676 (or 17674 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212028 is about 460.4649823819. The cubic root of 212028 is about 59.6299445640.

The spelling of 212028 in words is "two hundred twelve thousand, twenty-eight".