27128145 has 16 divisors (see below), whose sum is σ = 47351232. Its totient is φ = 13152960.

The previous prime is 27128117. The next prime is 27128161. The reversal of 27128145 is 54182172.

It is not a de Polignac number, because 27128145 - 2¹⁴ = 27111761 is a prime.

It is a super-2 number, since 2×27128145² = 1471872502282050, which contains 22 as substring.

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, 82042 + ... + 82371.

It is an arithmetic number, because the mean of its divisors is an integer number (2959452).

Almost surely, 2^27128145 is an apocalyptic number.

It is an amenable number.

27128145 is a deficient number, since it is larger than the sum of its proper divisors (20223087).

27128145 is a wasteful number, since it uses less digits than its factorization.

27128145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164432.

The product of its digits is 4480, while the sum is 30.

The square root of 27128145 is about 5208.4685849105. The cubic root of 27128145 is about 300.4738622323.

The spelling of 27128145 in words is "twenty-seven million, one hundred twenty-eight thousand, one hundred forty-five".