216468 has 36 divisors (see below), whose sum is σ = 626080. Its totient is φ = 61776.

The previous prime is 216451. The next prime is 216481. The reversal of 216468 is 864612.

216468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is a nialpdrome in base 12.

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 216468.

It is an unprimeable number.

216468 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 11 ways as a sum of consecutive naturals, for example, 178 + ... + 681.

2²¹⁶⁴⁶⁸ is an apocalyptic number.

216468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216468 is an abundant number, since it is smaller than the sum of its proper divisors (409612).

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

216468 is a wasteful number, since it uses less digits than its factorization.

216468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 871 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 216468 is about 465.2612169524. The cubic root of 216468 is about 60.0433020747.

The spelling of 216468 in words is "two hundred sixteen thousand, four hundred sixty-eight".