27978113 has 8 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 26713120.

The previous prime is 27978109. The next prime is 27978121. The reversal of 27978113 is 31187972.

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 27978113 - 2² = 27978109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27978163) 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, 5333 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

Almost surely, 2^27978113 is an apocalyptic number.

It is an amenable number.

27978113 is a deficient number, since it is larger than the sum of its proper divisors (1294207).

27978113 is a wasteful number, since it uses less digits than its factorization.

27978113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14607.

The product of its digits is 21168, while the sum is 38.

The square root of 27978113 is about 5289.4340907133. The cubic root of 27978113 is about 303.5797553452.

The spelling of 27978113 in words is "twenty-seven million, nine hundred seventy-eight thousand, one hundred thirteen".