211628 has 12 divisors (see below), whose sum is σ = 373632. Its totient is φ = 104880.

The previous prime is 211619. The next prime is 211639. The reversal of 211628 is 826112.

It is a plaindrome in base 11 and base 16.

It is a nialpdrome in base 13.

It is an unprimeable number.

211628 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, 626 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (31136).

2²¹¹⁶²⁸ is an apocalyptic number.

It is an amenable number.

211628 is a deficient number, since it is larger than the sum of its proper divisors (162004).

211628 is a wasteful number, since it uses less digits than its factorization.

211628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 470 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 211628 is about 460.0304337759. The cubic root of 211628 is about 59.5924228014.

The spelling of 211628 in words is "two hundred eleven thousand, six hundred twenty-eight".