27656138 has 16 divisors (see below), whose sum is σ = 42615936. Its totient is φ = 13453440.

The previous prime is 27656137. The next prime is 27656149. The reversal of 27656138 is 83165672.

It is not an unprimeable number, because it can be changed into a prime (27656137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29903 + ... + 30813.

It is an arithmetic number, because the mean of its divisors is an integer number (2663496).

Almost surely, 2^27656138 is an apocalyptic number.

27656138 is a deficient number, since it is larger than the sum of its proper divisors (14959798).

27656138 is a wasteful number, since it uses less digits than its factorization.

27656138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309.

The product of its digits is 60480, while the sum is 38.

The square root of 27656138 is about 5258.9103434077. The cubic root of 27656138 is about 302.4107169970.

The spelling of 27656138 in words is "twenty-seven million, six hundred fifty-six thousand, one hundred thirty-eight".