218936 has 8 divisors (see below), whose sum is σ = 410520. Its totient is φ = 109464.

The previous prime is 218923. The next prime is 218941. The reversal of 218936 is 639812.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 218899 and 218908.

It is a congruent number.

It is an unprimeable number.

218936 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 as a sum of consecutive naturals, namely, 13676 + ... + 13691.

It is an arithmetic number, because the mean of its divisors is an integer number (51315).

2²¹⁸⁹³⁶ is an apocalyptic number.

It is an amenable number.

218936 is a deficient number, since it is larger than the sum of its proper divisors (191584).

218936 is a wasteful number, since it uses less digits than its factorization.

218936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27373 (or 27369 counting only the distinct ones).

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

The square root of 218936 is about 467.9059734605. The cubic root of 218936 is about 60.2706293459.

The spelling of 218936 in words is "two hundred eighteen thousand, nine hundred thirty-six".