27638873 has 4 divisors (see below), whose sum is σ = 27659520. Its totient is φ = 27618228.

The previous prime is 27638851. The next prime is 27638909. The reversal of 27638873 is 37883672.

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 27638873 - 2¹⁴ = 27622489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27638813) 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, 8165 + ... + 11042.

It is an arithmetic number, because the mean of its divisors is an integer number (6914880).

Almost surely, 2^27638873 is an apocalyptic number.

It is an amenable number.

27638873 is a deficient number, since it is larger than the sum of its proper divisors (20647).

27638873 is a wasteful number, since it uses less digits than its factorization.

27638873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20646.

The product of its digits is 338688, while the sum is 44.

The square root of 27638873 is about 5257.2685873940. The cubic root of 27638873 is about 302.3477748769.

The spelling of 27638873 in words is "twenty-seven million, six hundred thirty-eight thousand, eight hundred seventy-three".