27638231 has 4 divisors (see below), whose sum is σ = 27662592. Its totient is φ = 27613872.

The previous prime is 27638183. The next prime is 27638251. The reversal of 27638231 is 13283672.

It is a happy number.

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 27638231 - 2⁶ = 27638167 is a prime.

It is a super-3 number, since 3×27638231³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27638251) 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, 10391 + ... + 12776.

It is an arithmetic number, because the mean of its divisors is an integer number (6915648).

Almost surely, 2^27638231 is an apocalyptic number.

27638231 is a deficient number, since it is larger than the sum of its proper divisors (24361).

27638231 is a wasteful number, since it uses less digits than its factorization.

27638231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24360.

The product of its digits is 12096, while the sum is 32.

The square root of 27638231 is about 5257.2075287171. The cubic root of 27638231 is about 302.3454338652.

The spelling of 27638231 in words is "twenty-seven million, six hundred thirty-eight thousand, two hundred thirty-one".