27688149 has 28 divisors (see below), whose sum is σ = 43720000. Its totient is φ = 17478504.

The previous prime is 27688139. The next prime is 27688181. The reversal of 27688149 is 94188672.

It is not a de Polignac number, because 27688149 - 2⁵ = 27688117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27688139) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 12852 + ... + 14850.

Almost surely, 2^27688149 is an apocalyptic number.

It is an amenable number.

27688149 is a deficient number, since it is larger than the sum of its proper divisors (16031851).

27688149 is an equidigital number, since it uses as much as digits as its factorization.

27688149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 2021 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 27688149 is about 5261.9529644420. The cubic root of 27688149 is about 302.5273485735.

The spelling of 27688149 in words is "twenty-seven million, six hundred eighty-eight thousand, one hundred forty-nine".