38831 has 8 divisors (see below), whose sum is σ = 43680. Its totient is φ = 34272.

The previous prime is 38821. The next prime is 38833. The reversal of 38831 is 13883.

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 38831 - 2⁶ = 38767 is a prime.

It is a super-2 number, since 2×38831² = 3015693122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38797 and 38806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38833) 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, 326 + ... + 428.

It is an arithmetic number, because the mean of its divisors is an integer number (5460).

2³⁸⁸³¹ is an apocalyptic number.

38831 is a deficient number, since it is larger than the sum of its proper divisors (4849).

38831 is a wasteful number, since it uses less digits than its factorization.

38831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145.

The product of its digits is 576, while the sum is 23.

The square root of 38831 is about 197.0558296524. The cubic root of 38831 is about 33.8630593391.

The spelling of 38831 in words is "thirty-eight thousand, eight hundred thirty-one".