27986631 has 8 divisors (see below), whose sum is σ = 37356144. Its totient is φ = 18637440.

The previous prime is 27986551. The next prime is 27986671. The reversal of 27986631 is 13668972.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-27986631 is a prime.

It is a super-2 number, since 2×27986631² = 1566503029460322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27986671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1506 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (4669518).

Almost surely, 2^27986631 is an apocalyptic number.

27986631 is a deficient number, since it is larger than the sum of its proper divisors (9369513).

27986631 is a wasteful number, since it uses less digits than its factorization.

27986631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10161.

The product of its digits is 108864, while the sum is 42.

The square root of 27986631 is about 5290.2392195439. The cubic root of 27986631 is about 303.6105607343.

The spelling of 27986631 in words is "twenty-seven million, nine hundred eighty-six thousand, six hundred thirty-one".