27805149 has 24 divisors (see below), whose sum is σ = 42748992. Its totient is φ = 17354880.

The previous prime is 27805139. The next prime is 27805157. The reversal of 27805149 is 94150872.

It is not a de Polignac number, because 27805149 - 2⁵ = 27805117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27805139) 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 23 ways as a sum of consecutive naturals, for example, 39894 + ... + 40584.

It is an arithmetic number, because the mean of its divisors is an integer number (1781208).

Almost surely, 2^27805149 is an apocalyptic number.

It is an amenable number.

27805149 is a deficient number, since it is larger than the sum of its proper divisors (14943843).

27805149 is a wasteful number, since it uses less digits than its factorization.

27805149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 27805149 is about 5273.0587897349. The cubic root of 27805149 is about 302.9528731071.

The spelling of 27805149 in words is "twenty-seven million, eight hundred five thousand, one hundred forty-nine".