27730105 has 16 divisors (see below), whose sum is σ = 36049104. Its totient is φ = 20355840.

The previous prime is 27730103. The next prime is 27730121. The reversal of 27730105 is 50103772.

It can be written as a sum of positive squares in 8 ways, for example, as 13682601 + 14047504 = 3699^2 + 3748^2 .

It is not a de Polignac number, because 27730105 - 2¹ = 27730103 is a prime.

It is a super-2 number, since 2×27730105² = 1537917446622050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27730105.

It is not an unprimeable number, because it can be changed into a prime (27730103) 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, 10587 + ... + 12943.

It is an arithmetic number, because the mean of its divisors is an integer number (2253069).

Almost surely, 2^27730105 is an apocalyptic number.

It is an amenable number.

27730105 is a deficient number, since it is larger than the sum of its proper divisors (8318999).

27730105 is a wasteful number, since it uses less digits than its factorization.

27730105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 27730105 is about 5265.9381880155. The cubic root of 27730105 is about 302.6800785574.

Adding to 27730105 its reverse (50103772), we get a palindrome (77833877).

The spelling of 27730105 in words is "twenty-seven million, seven hundred thirty thousand, one hundred five".