27328557 has 4 divisors (see below), whose sum is σ = 36438080. Its totient is φ = 18219036.

The previous prime is 27328547. The next prime is 27328559. The reversal of 27328557 is 75582372.

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 not a de Polignac number, because 27328557 - 2¹² = 27324461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27328559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4554757 + ... + 4554762.

It is an arithmetic number, because the mean of its divisors is an integer number (9109520).

Almost surely, 2^27328557 is an apocalyptic number.

It is an amenable number.

27328557 is a deficient number, since it is larger than the sum of its proper divisors (9109523).

27328557 is an equidigital number, since it uses as much as digits as its factorization.

27328557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109522.

The product of its digits is 117600, while the sum is 39.

The square root of 27328557 is about 5227.6722353262. The cubic root of 27328557 is about 301.2119749070.

The spelling of 27328557 in words is "twenty-seven million, three hundred twenty-eight thousand, five hundred fifty-seven".