38681 has 4 divisors (see below), whose sum is σ = 39552. Its totient is φ = 37812.

The previous prime is 38677. The next prime is 38693. The reversal of 38681 is 18683.

38681 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38681 - 2² = 38677 is a prime.

It is a super-2 number, since 2×38681² = 2992439522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38681.

It is not an unprimeable number, because it can be changed into a prime (38611) 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, 365 + ... + 458.

It is an arithmetic number, because the mean of its divisors is an integer number (9888).

2³⁸⁶⁸¹ is an apocalyptic number.

It is an amenable number.

38681 is a deficient number, since it is larger than the sum of its proper divisors (871).

38681 is an equidigital number, since it uses as much as digits as its factorization.

38681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 1152, while the sum is 26.

The square root of 38681 is about 196.6748585864. The cubic root of 38681 is about 33.8193999481.

It can be divided in two parts, 38 and 681, that multiplied together give a triangular number (25878 = T₂₂₇).

The spelling of 38681 in words is "thirty-eight thousand, six hundred eighty-one".