38911 has 4 divisors (see below), whose sum is σ = 39312.
Its totient is φ = 38512.
The previous prime is 38903. The next prime is 38917. The reversal of 38911 is 11983.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11983 = 23 ⋅521.
It is a cyclic number.
It is not a de Polignac number, because 38911 - 23 = 38903 is a prime.
It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is a plaindrome in base 8.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (38917) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51 + ... + 283.
It is an arithmetic number, because the mean of its divisors is an integer number (9828).
238911 is an apocalyptic number.
38911 is a deficient number, since it is larger than the sum of its proper divisors (401).
38911 is a wasteful number, since it uses less digits than its factorization.
38911 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 400.
The product of its digits is 216, while the sum is 22.
The square root of 38911 is about 197.2587133690.
The cubic root of 38911 is about 33.8862983876.
It can be divided in two parts, 389 and 11, that added together give a square (400 = 202).
The spelling of 38911 in words is "thirty-eight thousand, nine hundred eleven".