27986091 has 8 divisors (see below), whose sum is σ = 42645504. Its totient is φ = 15992040.

The previous prime is 27986081. The next prime is 27986099. The reversal of 27986091 is 19068972.

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

It is not a de Polignac number, because 27986091 - 2⁵ = 27986059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27986099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666315 + ... + 666356.

It is an arithmetic number, because the mean of its divisors is an integer number (5330688).

Almost surely, 2^27986091 is an apocalyptic number.

27986091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27986091 is a deficient number, since it is larger than the sum of its proper divisors (14659413).

27986091 is a wasteful number, since it uses less digits than its factorization.

27986091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332681.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 27986091 is about 5290.1881819081. The cubic root of 27986091 is about 303.6086080072.

The spelling of 27986091 in words is "twenty-seven million, nine hundred eighty-six thousand, ninety-one".