27916987 has 8 divisors (see below), whose sum is σ = 32355072. Its totient is φ = 23591400.

The previous prime is 27916979. The next prime is 27917033. The reversal of 27916987 is 78961972.

It is a happy number.

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

It is not a de Polignac number, because 27916987 - 2³ = 27916979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27916987.

It is not an unprimeable number, because it can be changed into a prime (27916927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27589 + ... + 28582.

It is an arithmetic number, because the mean of its divisors is an integer number (4044384).

Almost surely, 2^27916987 is an apocalyptic number.

27916987 is a deficient number, since it is larger than the sum of its proper divisors (4438085).

27916987 is an equidigital number, since it uses as much as digits as its factorization.

27916987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56249.

The product of its digits is 381024, while the sum is 49.

The square root of 27916987 is about 5283.6528084271. The cubic root of 27916987 is about 303.3585092281.

The spelling of 27916987 in words is "twenty-seven million, nine hundred sixteen thousand, nine hundred eighty-seven".