216708 has 12 divisors (see below), whose sum is σ = 505680. Its totient is φ = 72232.

The previous prime is 216703. The next prime is 216719. The reversal of 216708 is 807612.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (216703) by changing a digit.

216708 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, 9018 + ... + 9041.

It is an arithmetic number, because the mean of its divisors is an integer number (42140).

2²¹⁶⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

216708 is an abundant number, since it is smaller than the sum of its proper divisors (288972).

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

216708 is a wasteful number, since it uses less digits than its factorization.

216708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066 (or 18064 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 216708 is about 465.5190651305. The cubic root of 216708 is about 60.0654840602.

The spelling of 216708 in words is "two hundred sixteen thousand, seven hundred eight".