239668 has 24 divisors (see below), whose sum is σ = 493920. Its totient is φ = 100320.

The previous prime is 239641. The next prime is 239671. The reversal of 239668 is 866932.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

239668 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 in 7 ways as a sum of consecutive naturals, for example, 363 + ... + 781.

It is an arithmetic number, because the mean of its divisors is an integer number (20580).

2²³⁹⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

239668 is an abundant number, since it is smaller than the sum of its proper divisors (254252).

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

239668 is a wasteful number, since it uses less digits than its factorization.

239668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 445 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 239668 is about 489.5589852102. The cubic root of 239668 is about 62.1159813068.

Subtracting 239668 from its reverse (866932), we obtain a square (627264 = 792²).

The spelling of 239668 in words is "two hundred thirty-nine thousand, six hundred sixty-eight".