27886932281 has 4 divisors (see below), whose sum is σ = 30032080932. Its totient is φ = 25741783632.

The previous prime is 27886932257. The next prime is 27886932289. The reversal of 27886932281 is 18223968872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10305498256 + 17581434025 = 101516^2 + 132595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27886932281 is a prime.

It is a super-2 number, since 2×27886932281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27886932289) 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, 1072574306 + ... + 1072574331.

It is an arithmetic number, because the mean of its divisors is an integer number (7508020233).

Almost surely, 2^27886932281 is an apocalyptic number.

It is an amenable number.

27886932281 is a deficient number, since it is larger than the sum of its proper divisors (2145148651).

27886932281 is a wasteful number, since it uses less digits than its factorization.

27886932281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145148650.

The product of its digits is 4644864, while the sum is 56.

The spelling of 27886932281 in words is "twenty-seven billion, eight hundred eighty-six million, nine hundred thirty-two thousand, two hundred eighty-one".