238631 has 4 divisors (see below), whose sum is σ = 242064. Its totient is φ = 235200.

The previous prime is 238627. The next prime is 238639. The reversal of 238631 is 136832.

238631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 238631 - 2² = 238627 is a prime.

It is a super-2 number, since 2×238631² = 113889508322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238597 and 238606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610 + ... + 1751.

It is an arithmetic number, because the mean of its divisors is an integer number (60516).

2²³⁸⁶³¹ is an apocalyptic number.

238631 is a deficient number, since it is larger than the sum of its proper divisors (3433).

238631 is an equidigital number, since it uses as much as digits as its factorization.

238631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its digits is 864, while the sum is 23.

The square root of 238631 is about 488.4987205715. The cubic root of 238631 is about 62.0262635868.

The spelling of 238631 in words is "two hundred thirty-eight thousand, six hundred thirty-one".