218396 has 12 divisors (see below), whose sum is σ = 388080. Its totient is φ = 107520.

The previous prime is 218389. The next prime is 218401. The reversal of 218396 is 693812.

218396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2²¹⁸³⁹⁶ is an apocalyptic number.

It is an amenable number.

218396 is a deficient number, since it is larger than the sum of its proper divisors (169684).

218396 is a wasteful number, since it uses less digits than its factorization.

218396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 842 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 218396 is about 467.3285781974. The cubic root of 218396 is about 60.2210365659.

The spelling of 218396 in words is "two hundred eighteen thousand, three hundred ninety-six".