27328657 has 4 divisors (see below), whose sum is σ = 27366976. Its totient is φ = 27290340.

The previous prime is 27328649. The next prime is 27328687. The reversal of 27328657 is 75682372.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27328657 - 2³ = 27328649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27328687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18069 + ... + 19522.

It is an arithmetic number, because the mean of its divisors is an integer number (6841744).

Almost surely, 2^27328657 is an apocalyptic number.

It is an amenable number.

27328657 is a deficient number, since it is larger than the sum of its proper divisors (38319).

27328657 is an equidigital number, since it uses as much as digits as its factorization.

27328657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38318.

The product of its digits is 141120, while the sum is 40.

The square root of 27328657 is about 5227.6817998038. The cubic root of 27328657 is about 301.2123423024.

The spelling of 27328657 in words is "twenty-seven million, three hundred twenty-eight thousand, six hundred fifty-seven".