223864 has 8 divisors (see below), whose sum is σ = 419760. Its totient is φ = 111928.

The previous prime is 223849. The next prime is 223903. The reversal of 223864 is 468322.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

223864 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, 13984 + ... + 13999.

It is an arithmetic number, because the mean of its divisors is an integer number (52470).

2²²³⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

223864 is a deficient number, since it is larger than the sum of its proper divisors (195896).

223864 is a wasteful number, since it uses less digits than its factorization.

223864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27989 (or 27985 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 223864 is about 473.1426846100. The cubic root of 223864 is about 60.7194859939.

The spelling of 223864 in words is "two hundred twenty-three thousand, eight hundred sixty-four".