27748979 has 8 divisors (see below), whose sum is σ = 28224192. Its totient is φ = 27276480.

The previous prime is 27748967. The next prime is 27748993. The reversal of 27748979 is 97984772.

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 27748979 - 2²⁰ = 26700403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27748979.

It is not an unprimeable number, because it can be changed into a prime (27748909) 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, 33389 + ... + 34209.

It is an arithmetic number, because the mean of its divisors is an integer number (3528024).

Almost surely, 2^27748979 is an apocalyptic number.

27748979 is a deficient number, since it is larger than the sum of its proper divisors (475213).

27748979 is an equidigital number, since it uses as much as digits as its factorization.

27748979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357.

The product of its digits is 1778112, while the sum is 53.

The square root of 27748979 is about 5267.7299665036. The cubic root of 27748979 is about 302.7487342440.

The spelling of 27748979 in words is "twenty-seven million, seven hundred forty-eight thousand, nine hundred seventy-nine".