27750505 has 12 divisors (see below), whose sum is σ = 33698700. Its totient is φ = 21937152.

The previous prime is 27750479. The next prime is 27750521. The reversal of 27750505 is 50505772.

It can be written as a sum of positive squares in 6 ways, for example, as 7823209 + 19927296 = 2797^2 + 4464^2 .

It is not a de Polignac number, because 27750505 - 2¹⁹ = 27226217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143689 + ... + 143881.

It is an arithmetic number, because the mean of its divisors is an integer number (2808225).

Almost surely, 2^27750505 is an apocalyptic number.

It is an amenable number.

27750505 is a deficient number, since it is larger than the sum of its proper divisors (5948195).

27750505 is an equidigital number, since it uses as much as digits as its factorization.

27750505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 347 counting only the distinct ones).

The product of its (nonzero) digits is 12250, while the sum is 31.

The square root of 27750505 is about 5267.8748086871. The cubic root of 27750505 is about 302.7542838308.

The spelling of 27750505 in words is "twenty-seven million, seven hundred fifty thousand, five hundred five".