27398771 has 4 divisors (see below), whose sum is σ = 27641352. Its totient is φ = 27156192.

The previous prime is 27398753. The next prime is 27398803. The reversal of 27398771 is 17789372.

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 27398771 - 2¹⁴ = 27382387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27398731) 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 3 ways as a sum of consecutive naturals, for example, 121121 + ... + 121346.

It is an arithmetic number, because the mean of its divisors is an integer number (6910338).

Almost surely, 2^27398771 is an apocalyptic number.

27398771 is a deficient number, since it is larger than the sum of its proper divisors (242581).

27398771 is a wasteful number, since it uses less digits than its factorization.

27398771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242580.

The product of its digits is 148176, while the sum is 44.

The square root of 27398771 is about 5234.3835358139. The cubic root of 27398771 is about 301.4697176384.

The spelling of 27398771 in words is "twenty-seven million, three hundred ninety-eight thousand, seven hundred seventy-one".