218934 has 12 divisors (see below), whose sum is σ = 474396. Its totient is φ = 72972.

The previous prime is 218923. The next prime is 218941. The reversal of 218934 is 439812.

It is a junction number, because it is equal to n+sod(n) for n = 218898 and 218907.

It is a congruent number.

It is an unprimeable number.

218934 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6064 + ... + 6099.

It is an arithmetic number, because the mean of its divisors is an integer number (39533).

2²¹⁸⁹³⁴ is an apocalyptic number.

218934 is an abundant number, since it is smaller than the sum of its proper divisors (255462).

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

218934 is a wasteful number, since it uses less digits than its factorization.

218934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12171 (or 12168 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 218934 is about 467.9038362741. The cubic root of 218934 is about 60.2704458194.

The spelling of 218934 in words is "two hundred eighteen thousand, nine hundred thirty-four".