27838221 has 16 divisors (see below), whose sum is σ = 38465280. Its totient is φ = 17895680.

The previous prime is 27838219. The next prime is 27838229. The reversal of 27838221 is 12283872.

It is not a de Polignac number, because 27838221 - 2¹ = 27838219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27838229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9676 + ... + 12218.

It is an arithmetic number, because the mean of its divisors is an integer number (2404080).

Almost surely, 2^27838221 is an apocalyptic number.

It is an amenable number.

27838221 is a deficient number, since it is larger than the sum of its proper divisors (10627059).

27838221 is a wasteful number, since it uses less digits than its factorization.

27838221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676.

The product of its digits is 10752, while the sum is 33.

The square root of 27838221 is about 5276.1937985635. The cubic root of 27838221 is about 303.0729382513.

The spelling of 27838221 in words is "twenty-seven million, eight hundred thirty-eight thousand, two hundred twenty-one".