27840979 has 8 divisors (see below), whose sum is σ = 28739520. Its totient is φ = 26956776.

The previous prime is 27840977. The next prime is 27840991. The reversal of 27840979 is 97904872.

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 27840979 - 2¹ = 27840977 is a prime.

It is a super-2 number, since 2×27840979² = 1550240223356882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27840973) 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, 432 + ... + 7474.

It is an arithmetic number, because the mean of its divisors is an integer number (3592440).

Almost surely, 2^27840979 is an apocalyptic number.

27840979 is a deficient number, since it is larger than the sum of its proper divisors (898541).

27840979 is an equidigital number, since it uses as much as digits as its factorization.

27840979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 27840979 is about 5276.4551547417. The cubic root of 27840979 is about 303.0829466442.

The spelling of 27840979 in words is "twenty-seven million, eight hundred forty thousand, nine hundred seventy-nine".