27808977 has 16 divisors (see below), whose sum is σ = 42449792. Its totient is φ = 15863040.

The previous prime is 27808973. The next prime is 27809009. The reversal of 27808977 is 77980872.

It is not a de Polignac number, because 27808977 - 2² = 27808973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27808973) 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 15 ways as a sum of consecutive naturals, for example, 20793 + ... + 22089.

It is an arithmetic number, because the mean of its divisors is an integer number (2653112).

Almost surely, 2^27808977 is an apocalyptic number.

It is an amenable number.

27808977 is a deficient number, since it is larger than the sum of its proper divisors (14640815).

27808977 is a wasteful number, since it uses less digits than its factorization.

27808977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 27808977 is about 5273.4217544209. The cubic root of 27808977 is about 302.9667752130.

The spelling of 27808977 in words is "twenty-seven million, eight hundred eight thousand, nine hundred seventy-seven".