38909 has 8 divisors (see below), whose sum is σ = 43512. Its totient is φ = 34560.

The previous prime is 38903. The next prime is 38917. The reversal of 38909 is 90983.

It can be written as a sum of positive squares in 4 ways, for example, as 100 + 38809 = 10^2 + 197^2 .

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 38909 - 2⁸ = 38653 is a prime.

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 (38903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 569.

It is an arithmetic number, because the mean of its divisors is an integer number (5439).

2³⁸⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

38909 is a deficient number, since it is larger than the sum of its proper divisors (4603).

38909 is a wasteful number, since it uses less digits than its factorization.

38909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 38909 is about 197.2536438193. The cubic root of 38909 is about 33.8857177998.

The spelling of 38909 in words is "thirty-eight thousand, nine hundred nine".