27982015 has 4 divisors (see below), whose sum is σ = 33578424. Its totient is φ = 22385608.

The previous prime is 27982001. The next prime is 27982021. The reversal of 27982015 is 51028972.

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-27982015 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2798197 + ... + 2798206.

It is an arithmetic number, because the mean of its divisors is an integer number (8394606).

Almost surely, 2^27982015 is an apocalyptic number.

27982015 is a deficient number, since it is larger than the sum of its proper divisors (5596409).

27982015 is an equidigital number, since it uses as much as digits as its factorization.

27982015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5596408.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 27982015 is about 5289.8029263858. The cubic root of 27982015 is about 303.5938677234.

The spelling of 27982015 in words is "twenty-seven million, nine hundred eighty-two thousand, fifteen".