27883681 has 16 divisors (see below), whose sum is σ = 32953600. Its totient is φ = 23094720.

The previous prime is 27883657. The next prime is 27883693. The reversal of 27883681 is 18638872.

It is a happy number.

It is a 8-Lehmer number, since φ(27883681) divides (27883681-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 27883681 - 2¹⁹ = 27359393 is a prime.

It is a super-2 number, since 2×27883681² = 1554999332219522, which contains 22 as substring.

It is the 5281-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27883631) by changing a digit.

It is a nontrivial repunit in base 5280.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51271 + ... + 51811.

It is an arithmetic number, because the mean of its divisors is an integer number (2059600).

Almost surely, 2^27883681 is an apocalyptic number.

It is an amenable number.

27883681 is a deficient number, since it is larger than the sum of its proper divisors (5069919).

27883681 is a wasteful number, since it uses less digits than its factorization.

27883681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784.

The product of its digits is 129024, while the sum is 43.

The square root of 27883681 is about 5280.5000710160. The cubic root of 27883681 is about 303.2378219063.

The spelling of 27883681 in words is "twenty-seven million, eight hundred eighty-three thousand, six hundred eighty-one".