27328621 has 4 divisors (see below), whose sum is σ = 27361152. Its totient is φ = 27296092.

The previous prime is 27328603. The next prime is 27328649. The reversal of 27328621 is 12682372.

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 27328621 - 2¹³ = 27320429 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 (27328421) 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, 14971 + ... + 16696.

It is an arithmetic number, because the mean of its divisors is an integer number (6840288).

Almost surely, 2^27328621 is an apocalyptic number.

It is an amenable number.

27328621 is a deficient number, since it is larger than the sum of its proper divisors (32531).

27328621 is an equidigital number, since it uses as much as digits as its factorization.

27328621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32530.

The product of its digits is 8064, while the sum is 31.

The square root of 27328621 is about 5227.6783565939. The cubic root of 27328621 is about 301.2122100402.

The spelling of 27328621 in words is "twenty-seven million, three hundred twenty-eight thousand, six hundred twenty-one".