27681369 has 8 divisors (see below), whose sum is σ = 37156800. Its totient is φ = 18330096.

The previous prime is 27681361. The next prime is 27681421. The reversal of 27681369 is 96318672.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27681369 - 2³ = 27681361 is a prime.

It is a super-2 number, since 2×27681369² = 1532516379428322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27681369.

It is not an unprimeable number, because it can be changed into a prime (27681361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30517 + ... + 31410.

It is an arithmetic number, because the mean of its divisors is an integer number (4644600).

Almost surely, 2^27681369 is an apocalyptic number.

It is an amenable number.

27681369 is a deficient number, since it is larger than the sum of its proper divisors (9475431).

27681369 is a wasteful number, since it uses less digits than its factorization.

27681369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62079.

The product of its digits is 108864, while the sum is 42.

The square root of 27681369 is about 5261.3086775060. The cubic root of 27681369 is about 302.5026532563.

The spelling of 27681369 in words is "twenty-seven million, six hundred eighty-one thousand, three hundred sixty-nine".