27930987 has 20 divisors (see below), whose sum is σ = 47685616. Its totient is φ = 15960240.

The previous prime is 27930979. The next prime is 27930997. The reversal of 27930987 is 78903972.

It is not a de Polignac number, because 27930987 - 2³ = 27930979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27930937) 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 19 ways as a sum of consecutive naturals, for example, 24064 + ... + 25197.

Almost surely, 2^27930987 is an apocalyptic number.

27930987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

27930987 is a deficient number, since it is larger than the sum of its proper divisors (19754629).

27930987 is an equidigital number, since it uses as much as digits as its factorization.

27930987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49280 (or 49271 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 27930987 is about 5284.9774833957. The cubic root of 27930987 is about 303.4092108480.

The spelling of 27930987 in words is "twenty-seven million, nine hundred thirty thousand, nine hundred eighty-seven".