27648443 has 4 divisors (see below), whose sum is σ = 29274840. Its totient is φ = 26022048.

The previous prime is 27648431. The next prime is 27648449. The reversal of 27648443 is 34484672.

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

It is a cyclic number.

It is not a de Polignac number, because 27648443 - 2⁴ = 27648427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27648397 and 27648406.

It is not an unprimeable number, because it can be changed into a prime (27648449) 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, 813173 + ... + 813206.

It is an arithmetic number, because the mean of its divisors is an integer number (7318710).

Almost surely, 2^27648443 is an apocalyptic number.

27648443 is a deficient number, since it is larger than the sum of its proper divisors (1626397).

27648443 is a wasteful number, since it uses less digits than its factorization.

27648443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626396.

The product of its digits is 129024, while the sum is 38.

The square root of 27648443 is about 5258.1786770706. The cubic root of 27648443 is about 302.3826669691.

The spelling of 27648443 in words is "twenty-seven million, six hundred forty-eight thousand, four hundred forty-three".