27706145 has 16 divisors (see below), whose sum is σ = 35095680. Its totient is φ = 20955264.

The previous prime is 27706109. The next prime is 27706177. The reversal of 27706145 is 54160772.

It is a cyclic number.

It is not a de Polignac number, because 27706145 - 2¹⁶ = 27640609 is a prime.

It is a super-2 number, since 2×27706145² = 1535260941522050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8882 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (2193480).

Almost surely, 2^27706145 is an apocalyptic number.

It is an amenable number.

27706145 is a deficient number, since it is larger than the sum of its proper divisors (7389535).

27706145 is a wasteful number, since it uses less digits than its factorization.

27706145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 27706145 is about 5263.6626981599. The cubic root of 27706145 is about 302.5928772477.

The spelling of 27706145 in words is "twenty-seven million, seven hundred six thousand, one hundred forty-five".