27982779 has 16 divisors (see below), whose sum is σ = 41019264. Its totient is φ = 16827200.

The previous prime is 27982753. The next prime is 27982793. The reversal of 27982779 is 97728972.

It is a cyclic number.

It is not a de Polignac number, because 27982779 - 2⁸ = 27982523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27982729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1087 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (2563704).

Almost surely, 2^27982779 is an apocalyptic number.

27982779 is a deficient number, since it is larger than the sum of its proper divisors (13036485).

27982779 is a wasteful number, since it uses less digits than its factorization.

27982779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6618.

The product of its digits is 889056, while the sum is 51.

The square root of 27982779 is about 5289.8751403034. The cubic root of 27982779 is about 303.5966307315.

The spelling of 27982779 in words is "twenty-seven million, nine hundred eighty-two thousand, seven hundred seventy-nine".