216028 has 12 divisors (see below), whose sum is σ = 385560. Its totient is φ = 105872.

The previous prime is 216023. The next prime is 216037. The reversal of 216028 is 820612.

It is a happy number.

216028 is nontrivially palindromic in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 215996 and 216014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298 + ... + 721.

It is an arithmetic number, because the mean of its divisors is an integer number (32130).

216028 is a Friedman number, since it can be written as 60^(2+1)+28, using all its digits and the basic arithmetic operations.

2²¹⁶⁰²⁸ is an apocalyptic number.

It is an amenable number.

216028 is a deficient number, since it is larger than the sum of its proper divisors (169532).

216028 is a wasteful number, since it uses less digits than its factorization.

216028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 216028 is about 464.7881237725. The cubic root of 216028 is about 60.0025924806.

The spelling of 216028 in words is "two hundred sixteen thousand, twenty-eight".