27745207 has 16 divisors (see below), whose sum is σ = 33903360. Its totient is φ = 22163328.

The previous prime is 27745189. The next prime is 27745261. The reversal of 27745207 is 70254772.

It is a cyclic number.

It is not a de Polignac number, because 27745207 - 2¹⁵ = 27712439 is a prime.

It is a super-2 number, since 2×27745207² = 1539593022945698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27745307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11644 + ... + 13822.

It is an arithmetic number, because the mean of its divisors is an integer number (2118960).

Almost surely, 2^27745207 is an apocalyptic number.

27745207 is a deficient number, since it is larger than the sum of its proper divisors (6158153).

27745207 is a wasteful number, since it uses less digits than its factorization.

27745207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 27745207 is about 5267.3719253533. The cubic root of 27745207 is about 302.7350157816.

Adding to 27745207 its reverse (70254772), we get a palindrome (97999979).

The spelling of 27745207 in words is "twenty-seven million, seven hundred forty-five thousand, two hundred seven".