27985963 has 8 divisors (see below), whose sum is σ = 30145536. Its totient is φ = 25905000.

The previous prime is 27985939. The next prime is 27985981. The reversal of 27985963 is 36958972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27985963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27985913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18913 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (3768192).

Almost surely, 2^27985963 is an apocalyptic number.

27985963 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

27985963 is a deficient number, since it is larger than the sum of its proper divisors (2159573).

27985963 is a wasteful number, since it uses less digits than its factorization.

27985963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39305.

The product of its digits is 816480, while the sum is 49.

The square root of 27985963 is about 5290.1760840259. The cubic root of 27985963 is about 303.6081451349.

The spelling of 27985963 in words is "twenty-seven million, nine hundred eighty-five thousand, nine hundred sixty-three".