27985853 has 4 divisors (see below), whose sum is σ = 31983840. Its totient is φ = 23987868.

The previous prime is 27985849. The next prime is 27985873. The reversal of 27985853 is 35858972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27985853 - 2² = 27985849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27985798 and 27985807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27985823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1998983 + ... + 1998996.

It is an arithmetic number, because the mean of its divisors is an integer number (7995960).

Almost surely, 2^27985853 is an apocalyptic number.

It is an amenable number.

27985853 is a deficient number, since it is larger than the sum of its proper divisors (3997987).

27985853 is an equidigital number, since it uses as much as digits as its factorization.

27985853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997986.

The product of its digits is 604800, while the sum is 47.

The square root of 27985853 is about 5290.1656873864. The cubic root of 27985853 is about 303.6077473528.

The spelling of 27985853 in words is "twenty-seven million, nine hundred eighty-five thousand, eight hundred fifty-three".