27982387 has 4 divisors (see below), whose sum is σ = 28186776. Its totient is φ = 27778000.

The previous prime is 27982369. The next prime is 27982399. The reversal of 27982387 is 78328972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27982387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27982327) 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, 101989 + ... + 102262.

It is an arithmetic number, because the mean of its divisors is an integer number (7046694).

Almost surely, 2^27982387 is an apocalyptic number.

27982387 is a deficient number, since it is larger than the sum of its proper divisors (204389).

27982387 is a wasteful number, since it uses less digits than its factorization.

27982387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204388.

The product of its digits is 338688, while the sum is 46.

The square root of 27982387 is about 5289.8380882594. The cubic root of 27982387 is about 303.5952130687.

The spelling of 27982387 in words is "twenty-seven million, nine hundred eighty-two thousand, three hundred eighty-seven".