238687 has 4 divisors (see below), whose sum is σ = 245176. Its totient is φ = 232200.

The previous prime is 238681. The next prime is 238691. The reversal of 238687 is 786832.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238681) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3189 + ... + 3262.

It is an arithmetic number, because the mean of its divisors is an integer number (61294).

2²³⁸⁶⁸⁷ is an apocalyptic number.

238687 is a deficient number, since it is larger than the sum of its proper divisors (6489).

238687 is an equidigital number, since it uses as much as digits as its factorization.

238687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6488.

The product of its digits is 16128, while the sum is 34.

The square root of 238687 is about 488.5560356807. The cubic root of 238687 is about 62.0311151486.

The spelling of 238687 in words is "two hundred thirty-eight thousand, six hundred eighty-seven".