27799865 has 8 divisors (see below), whose sum is σ = 33396288. Its totient is φ = 22215600.

The previous prime is 27799843. The next prime is 27799867. The reversal of 27799865 is 56899772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27799865 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27799867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3140 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (4174536).

Almost surely, 2^27799865 is an apocalyptic number.

It is an amenable number.

27799865 is a deficient number, since it is larger than the sum of its proper divisors (5596423).

27799865 is a wasteful number, since it uses less digits than its factorization.

27799865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079.

The product of its digits is 1905120, while the sum is 53.

The square root of 27799865 is about 5272.5577284654. The cubic root of 27799865 is about 302.9336811654.

The spelling of 27799865 in words is "twenty-seven million, seven hundred ninety-nine thousand, eight hundred sixty-five".