38987 has 4 divisors (see below), whose sum is σ = 42000. Its totient is φ = 35976.

The previous prime is 38977. The next prime is 38993. The reversal of 38987 is 78983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78983 = 19 ⋅4157.

It is a cyclic number.

It is not a de Polignac number, because 38987 - 2⁴ = 38971 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 15.

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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1487 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (10500).

2³⁸⁹⁸⁷ is an apocalyptic number.

38987 is a deficient number, since it is larger than the sum of its proper divisors (3013).

38987 is a wasteful number, since it uses less digits than its factorization.

38987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012.

The product of its digits is 12096, while the sum is 35.

The square root of 38987 is about 197.4512598086. The cubic root of 38987 is about 33.9083459987.

The spelling of 38987 in words is "thirty-eight thousand, nine hundred eighty-seven".