27438657 has 8 divisors (see below), whose sum is σ = 36612576. Its totient is φ = 18278592.

The previous prime is 27438643. The next prime is 27438661. The reversal of 27438657 is 75683472.

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

It is not a de Polignac number, because 27438657 - 2⁷ = 27438529 is a prime.

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 not an unprimeable number, because it can be changed into a prime (27438637) 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 7 ways as a sum of consecutive naturals, for example, 2758 + ... + 7904.

It is an arithmetic number, because the mean of its divisors is an integer number (4576572).

Almost surely, 2^27438657 is an apocalyptic number.

It is an amenable number.

27438657 is a deficient number, since it is larger than the sum of its proper divisors (9173919).

27438657 is a wasteful number, since it uses less digits than its factorization.

27438657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6927.

The product of its digits is 282240, while the sum is 42.

The square root of 27438657 is about 5238.1921499693. The cubic root of 27438657 is about 301.6159357660.

The spelling of 27438657 in words is "twenty-seven million, four hundred thirty-eight thousand, six hundred fifty-seven".