27938291 has 4 divisors (see below), whose sum is σ = 27953472. Its totient is φ = 27923112.

The previous prime is 27938279. The next prime is 27938357. The reversal of 27938291 is 19283972.

It is a happy number.

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 27938291 - 2¹⁸ = 27676147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27938221) 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, 4376 + ... + 8661.

It is an arithmetic number, because the mean of its divisors is an integer number (6988368).

Almost surely, 2^27938291 is an apocalyptic number.

27938291 is a deficient number, since it is larger than the sum of its proper divisors (15181).

27938291 is a wasteful number, since it uses less digits than its factorization.

27938291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15180.

The product of its digits is 54432, while the sum is 41.

The square root of 27938291 is about 5285.6684534692. The cubic root of 27938291 is about 303.4356558823.

The spelling of 27938291 in words is "twenty-seven million, nine hundred thirty-eight thousand, two hundred ninety-one".