223866 has 12 divisors (see below), whose sum is σ = 485082. Its totient is φ = 74616.

The previous prime is 223849. The next prime is 223903. The reversal of 223866 is 668322.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 2025 = 471^2 + 45^2 .

It is an unprimeable 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, 6201 + ... + 6236.

2²²³⁸⁶⁶ is an apocalyptic number.

223866 is an abundant number, since it is smaller than the sum of its proper divisors (261216).

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

223866 is a wasteful number, since it uses less digits than its factorization.

223866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12445 (or 12442 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 223866 is about 473.1447981327. The cubic root of 223866 is about 60.7196668159.

It can be divided in two parts, 2238 and 66, that added together give a square (2304 = 48²).

The spelling of 223866 in words is "two hundred twenty-three thousand, eight hundred sixty-six".