238391 has 8 divisors (see below), whose sum is σ = 259920. Its totient is φ = 217728.

The previous prime is 238373. The next prime is 238397. The reversal of 238391 is 193832.

238391 is nontrivially palindromic in base 12.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238391 - 2¹⁴ = 222007 is a prime.

It is a Duffinian number.

238391 is an undulating number in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 238391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238397) 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 7 ways as a sum of consecutive naturals, for example, 440 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (32490).

2²³⁸³⁹¹ is an apocalyptic number.

238391 is a deficient number, since it is larger than the sum of its proper divisors (21529).

238391 is a wasteful number, since it uses less digits than its factorization.

238391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433.

The product of its digits is 1296, while the sum is 26.

The square root of 238391 is about 488.2530081833. The cubic root of 238391 is about 62.0054625780.

The spelling of 238391 in words is "two hundred thirty-eight thousand, three hundred ninety-one".