27129855 has 16 divisors (see below), whose sum is σ = 43632864. Its totient is φ = 14394240.

The previous prime is 27129829. The next prime is 27129863. The reversal of 27129855 is 55892172.

It is not a de Polignac number, because 27129855 - 2⁷ = 27129727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (2727054).

Almost surely, 2^27129855 is an apocalyptic number.

27129855 is a deficient number, since it is larger than the sum of its proper divisors (16503009).

27129855 is a wasteful number, since it uses less digits than its factorization.

27129855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9386.

The product of its digits is 50400, while the sum is 39.

The square root of 27129855 is about 5208.6327380609. The cubic root of 27129855 is about 300.4801754728.

The spelling of 27129855 in words is "twenty-seven million, one hundred twenty-nine thousand, eight hundred fifty-five".