27438345 has 48 divisors (see below), whose sum is σ = 53831232. Its totient is φ = 13296960.

The previous prime is 27438329. The next prime is 27438347. The reversal of 27438345 is 54383472.

It is a happy number.

27438345 is a `hidden beast` number, since 274 + 383 + 4 + 5 = 666.

It is not a de Polignac number, because 27438345 - 2⁴ = 27438329 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27438347) 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 47 ways as a sum of consecutive naturals, for example, 12339 + ... + 14391.

It is an arithmetic number, because the mean of its divisors is an integer number (1121484).

Almost surely, 2^27438345 is an apocalyptic number.

It is an amenable number.

27438345 is a deficient number, since it is larger than the sum of its proper divisors (26392887).

27438345 is a wasteful number, since it uses less digits than its factorization.

27438345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2072 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 27438345 is about 5238.1623686175. The cubic root of 27438345 is about 301.6147925550.

It can be divided in two parts, 2 and 7438345, that added together give a palindrome (7438347).

The spelling of 27438345 in words is "twenty-seven million, four hundred thirty-eight thousand, three hundred forty-five".