27009138 has 32 divisors (see below), whose sum is σ = 59169600. Its totient is φ = 8168256.

The previous prime is 27009137. The next prime is 27009167. The reversal of 27009138 is 83190072.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27009137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1668 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (1849050).

Almost surely, 2^27009138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27009138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29584800).

27009138 is an abundant number, since it is smaller than the sum of its proper divisors (32160462).

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

27009138 is a wasteful number, since it uses less digits than its factorization.

27009138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5946.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 27009138 is about 5197.0316527803. The cubic root of 27009138 is about 300.0338406270.

The spelling of 27009138 in words is "twenty-seven million, nine thousand, one hundred thirty-eight".