27938197 has 8 divisors (see below), whose sum is σ = 31961600. Its totient is φ = 23922864.

The previous prime is 27938159. The next prime is 27938221. The reversal of 27938197 is 79183972.

It is a happy number.

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

It is not a de Polignac number, because 27938197 - 2¹¹ = 27936149 is a prime.

It is a super-2 number, since 2×27938197² = 1561085703221618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27938597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11179 + ... + 13447.

It is an arithmetic number, because the mean of its divisors is an integer number (3995200).

Almost surely, 2^27938197 is an apocalyptic number.

It is an amenable number.

27938197 is a deficient number, since it is larger than the sum of its proper divisors (4023403).

27938197 is a wasteful number, since it uses less digits than its factorization.

27938197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035.

The product of its digits is 190512, while the sum is 46.

The square root of 27938197 is about 5285.6595614928. The cubic root of 27938197 is about 303.4353155730.

The spelling of 27938197 in words is "twenty-seven million, nine hundred thirty-eight thousand, one hundred ninety-seven".