27340405 has 16 divisors (see below), whose sum is σ = 33384960. Its totient is φ = 21492352.

The previous prime is 27340393. The next prime is 27340409. The reversal of 27340405 is 50404372.

It is a cyclic number.

It is not a de Polignac number, because 27340405 - 2¹¹ = 27338357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27340405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27340409) 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 15 ways as a sum of consecutive naturals, for example, 114276 + ... + 114514.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^27340405 is an apocalyptic number.

It is an amenable number.

27340405 is a deficient number, since it is larger than the sum of its proper divisors (6044555).

27340405 is a wasteful number, since it uses less digits than its factorization.

27340405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 27340405 is about 5228.8053128798. The cubic root of 27340405 is about 301.2554976815.

Adding to 27340405 its reverse (50404372), we get a palindrome (77744777).

The spelling of 27340405 in words is "twenty-seven million, three hundred forty thousand, four hundred five".