216908 has 12 divisors (see below), whose sum is σ = 382872. Its totient is φ = 107520.

The previous prime is 216901. The next prime is 216911. The reversal of 216908 is 809612.

216908 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216908.

It is not an unprimeable number, because it can be changed into a prime (216901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 716 + ... + 972.

It is an arithmetic number, because the mean of its divisors is an integer number (31906).

2²¹⁶⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

216908 is a deficient number, since it is larger than the sum of its proper divisors (165964).

216908 is a wasteful number, since it uses less digits than its factorization.

216908 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 (nonzero) digits is 864, while the sum is 26.

The square root of 216908 is about 465.7338295636. The cubic root of 216908 is about 60.0839565409.

Subtracting 216908 from its reverse (809612), we obtain a cube (592704 = 84³).

The spelling of 216908 in words is "two hundred sixteen thousand, nine hundred eight".