27728777 has 8 divisors (see below), whose sum is σ = 29019840. Its totient is φ = 26444880.

The previous prime is 27728773. The next prime is 27728797. The reversal of 27728777 is 77782772.

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 27728777 - 2² = 27728773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27728773) 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, 7127 + ... + 10307.

It is an arithmetic number, because the mean of its divisors is an integer number (3627480).

Almost surely, 2^27728777 is an apocalyptic number.

It is an amenable number.

27728777 is a deficient number, since it is larger than the sum of its proper divisors (1291063).

27728777 is a wasteful number, since it uses less digits than its factorization.

27728777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583.

The product of its digits is 537824, while the sum is 47.

The square root of 27728777 is about 5265.8120931154. The cubic root of 27728777 is about 302.6752466781.

The spelling of 27728777 in words is "twenty-seven million, seven hundred twenty-eight thousand, seven hundred seventy-seven".