38391 has 8 divisors (see below), whose sum is σ = 52224. Its totient is φ = 25080.

The previous prime is 38377. The next prime is 38393. The reversal of 38391 is 19383.

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

It is not a de Polignac number, because 38391 - 2⁶ = 38327 is a prime.

38391 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38393) 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, 106 + ... + 296.

It is an arithmetic number, because the mean of its divisors is an integer number (6528).

2³⁸³⁹¹ is an apocalyptic number.

38391 is a deficient number, since it is larger than the sum of its proper divisors (13833).

38391 is a wasteful number, since it uses less digits than its factorization.

38391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261.

The product of its digits is 648, while the sum is 24.

The square root of 38391 is about 195.9362141106. The cubic root of 38391 is about 33.7346706790.

It can be divided in two parts, 383 and 91, that added together give a palindrome (474).

The spelling of 38391 in words is "thirty-eight thousand, three hundred ninety-one".