27129985 has 8 divisors (see below), whose sum is σ = 32751936. Its totient is φ = 21573360.

The previous prime is 27129983. The next prime is 27130007. The reversal of 27129985 is 58992172.

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

It is not a de Polignac number, because 27129985 - 2¹ = 27129983 is a prime.

It is a super-2 number, since 2×27129985² = 1472072172200450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27129983) 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 7 ways as a sum of consecutive naturals, for example, 15411 + ... + 17080.

It is an arithmetic number, because the mean of its divisors is an integer number (4093992).

Almost surely, 2^27129985 is an apocalyptic number.

It is an amenable number.

27129985 is a deficient number, since it is larger than the sum of its proper divisors (5621951).

27129985 is a wasteful number, since it uses less digits than its factorization.

27129985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32663.

The product of its digits is 90720, while the sum is 43.

The square root of 27129985 is about 5208.6452173286. The cubic root of 27129985 is about 300.4806554159.

The spelling of 27129985 in words is "twenty-seven million, one hundred twenty-nine thousand, nine hundred eighty-five".