27908147 has 4 divisors (see below), whose sum is σ = 28095600. Its totient is φ = 27720696.

The previous prime is 27908141. The next prime is 27908173. The reversal of 27908147 is 74180972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27908147 - 2¹⁴ = 27891763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27908147.

It is not an unprimeable number, because it can be changed into a prime (27908141) 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 3 ways as a sum of consecutive naturals, for example, 93503 + ... + 93800.

It is an arithmetic number, because the mean of its divisors is an integer number (7023900).

Almost surely, 2^27908147 is an apocalyptic number.

27908147 is a deficient number, since it is larger than the sum of its proper divisors (187453).

27908147 is a wasteful number, since it uses less digits than its factorization.

27908147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187452.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 27908147 is about 5282.8161997177. The cubic root of 27908147 is about 303.3264860454.

The spelling of 27908147 in words is "twenty-seven million, nine hundred eight thousand, one hundred forty-seven".