223986 has 16 divisors (see below), whose sum is σ = 512064. Its totient is φ = 63984.

The previous prime is 223969. The next prime is 223999. The reversal of 223986 is 689322.

It is a congruent number.

It is an unprimeable number.

223986 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 7 ways as a sum of consecutive naturals, for example, 2625 + ... + 2708.

It is an arithmetic number, because the mean of its divisors is an integer number (32004).

2²²³⁹⁸⁶ is an apocalyptic number.

223986 is an abundant number, since it is smaller than the sum of its proper divisors (288078).

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

223986 is a wasteful number, since it uses less digits than its factorization.

223986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5345.

The product of its digits is 5184, while the sum is 30.

The square root of 223986 is about 473.2715922174. The cubic root of 223986 is about 60.7305141657.

The spelling of 223986 in words is "two hundred twenty-three thousand, nine hundred eighty-six".