223688 has 8 divisors (see below), whose sum is σ = 419430. Its totient is φ = 111840.

The previous prime is 223681. The next prime is 223697. The reversal of 223688 is 886322.

223688 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 13924 = 458^2 + 118^2 .

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

It is a plaindrome in base 10.

It is a nialpdrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 223688.

It is not an unprimeable number, because it can be changed into a prime (223681) by changing a digit.

223688 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, 13973 + ... + 13988.

2²²³⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

223688 is a deficient number, since it is larger than the sum of its proper divisors (195742).

223688 is a wasteful number, since it uses less digits than its factorization.

223688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27967 (or 27963 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 223688 is about 472.9566576337. The cubic root of 223688 is about 60.7035694384.

The spelling of 223688 in words is "two hundred twenty-three thousand, six hundred eighty-eight".