38981 has 4 divisors (see below), whose sum is σ = 41292. Its totient is φ = 36672.

The previous prime is 38977. The next prime is 38993. The reversal of 38981 is 18983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18983 = 41 ⋅463.

It can be written as a sum of positive squares in 2 ways, for example, as 21025 + 17956 = 145^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 38981 - 2² = 38977 is a prime.

It is a super-2 number, since 2×38981² = 3039036722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38921) 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, 1130 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (10323).

2³⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

38981 is a deficient number, since it is larger than the sum of its proper divisors (2311).

38981 is a wasteful number, since it uses less digits than its factorization.

38981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its digits is 1728, while the sum is 29.

The square root of 38981 is about 197.4360656010. The cubic root of 38981 is about 33.9066064401.

The spelling of 38981 in words is "thirty-eight thousand, nine hundred eighty-one".