27280065 has 16 divisors (see below), whose sum is σ = 44074368. Its totient is φ = 14407296.

The previous prime is 27280049. The next prime is 27280073. The reversal of 27280065 is 56008272.

It is not a de Polignac number, because 27280065 - 2⁴ = 27280049 is a prime.

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, 7284 + ... + 10373.

It is an arithmetic number, because the mean of its divisors is an integer number (2754648).

Almost surely, 2^27280065 is an apocalyptic number.

It is an amenable number.

27280065 is a deficient number, since it is larger than the sum of its proper divisors (16794303).

27280065 is a wasteful number, since it uses less digits than its factorization.

27280065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17768.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 27280065 is about 5223.0321653231. The cubic root of 27280065 is about 301.0337118196.

The spelling of 27280065 in words is "twenty-seven million, two hundred eighty thousand, sixty-five".