27938109 has 8 divisors (see below), whose sum is σ = 37418752. Its totient is φ = 18541440.

The previous prime is 27938059. The next prime is 27938111. The reversal of 27938109 is 90183972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27938109 - 2⁸ = 27937853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27938149) 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, 20212 + ... + 21549.

It is an arithmetic number, because the mean of its divisors is an integer number (4677344).

Almost surely, 2^27938109 is an apocalyptic number.

It is an amenable number.

27938109 is a deficient number, since it is larger than the sum of its proper divisors (9480643).

27938109 is a wasteful number, since it uses less digits than its factorization.

27938109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41987.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 27938109 is about 5285.6512370757. The cubic root of 27938109 is about 303.4349969849.

The spelling of 27938109 in words is "twenty-seven million, nine hundred thirty-eight thousand, one hundred nine".