27216138 has 8 divisors (see below), whose sum is σ = 54432288. Its totient is φ = 9072044.

The previous prime is 27216121. The next prime is 27216139. The reversal of 27216138 is 83161272.

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

27216138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (27216139) 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, 2268006 + ... + 2268017.

It is an arithmetic number, because the mean of its divisors is an integer number (6804036).

Almost surely, 2^27216138 is an apocalyptic number.

27216138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27216138 is a wasteful number, since it uses less digits than its factorization.

27216138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536028.

The product of its digits is 4032, while the sum is 30.

The square root of 27216138 is about 5216.9088548680. The cubic root of 27216138 is about 300.7983845002.

The spelling of 27216138 in words is "twenty-seven million, two hundred sixteen thousand, one hundred thirty-eight".