38687 has 4 divisors (see below), whose sum is σ = 42216. Its totient is φ = 35160.

The previous prime is 38677. The next prime is 38693. The reversal of 38687 is 78683.

Added to its reverse (78683) it gives a triangular number (117370 = T₄₈₄).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38687 - 2⁴ = 38671 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38677) 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, 1748 + ... + 1769.

It is an arithmetic number, because the mean of its divisors is an integer number (10554).

2³⁸⁶⁸⁷ is an apocalyptic number.

38687 is a deficient number, since it is larger than the sum of its proper divisors (3529).

38687 is a wasteful number, since it uses less digits than its factorization.

38687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528.

The product of its digits is 8064, while the sum is 32.

The square root of 38687 is about 196.6901115969. The cubic root of 38687 is about 33.8211484888.

Adding to 38687 its reverse (78683), we get a triangular number (117370 = T₄₈₄).

It can be divided in two parts, 38 and 687, that multiplied together give a triangular number (26106 = T₂₂₈).

The spelling of 38687 in words is "thirty-eight thousand, six hundred eighty-seven".