27428593 has 4 divisors (see below), whose sum is σ = 27711460. Its totient is φ = 27145728.

The previous prime is 27428579. The next prime is 27428617. The reversal of 27428593 is 39582472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16459249 + 10969344 = 4057^2 + 3312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27428593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27428543) 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, 141288 + ... + 141481.

It is an arithmetic number, because the mean of its divisors is an integer number (6927865).

Almost surely, 2^27428593 is an apocalyptic number.

It is an amenable number.

27428593 is a deficient number, since it is larger than the sum of its proper divisors (282867).

27428593 is an equidigital number, since it uses as much as digits as its factorization.

27428593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282866.

The product of its digits is 120960, while the sum is 40.

The square root of 27428593 is about 5237.2314250948. The cubic root of 27428593 is about 301.5790555114.

The spelling of 27428593 in words is "twenty-seven million, four hundred twenty-eight thousand, five hundred ninety-three".