27985885 has 8 divisors (see below), whose sum is σ = 34133976. Its totient is φ = 22021440.

The previous prime is 27985873. The next prime is 27985907. The reversal of 27985885 is 58858972.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2442969 + 25542916 = 1563^2 + 5054^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-27985885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45574 + ... + 46183.

It is an arithmetic number, because the mean of its divisors is an integer number (4266747).

Almost surely, 2^27985885 is an apocalyptic number.

It is an amenable number.

27985885 is a deficient number, since it is larger than the sum of its proper divisors (6148091).

27985885 is an equidigital number, since it uses as much as digits as its factorization.

27985885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91823.

The product of its digits is 1612800, while the sum is 52.

The square root of 27985885 is about 5290.1687118654. The cubic root of 27985885 is about 303.6078630714.

The spelling of 27985885 in words is "twenty-seven million, nine hundred eighty-five thousand, eight hundred eighty-five".