27880385 has 16 divisors (see below), whose sum is σ = 36714384. Its totient is φ = 20197632.

The previous prime is 27880381. The next prime is 27880387. The reversal of 27880385 is 58308872.

It can be written as a sum of positive squares in 8 ways, for example, as 923521 + 26956864 = 961^2 + 5192^2 .

It is not a de Polignac number, because 27880385 - 2² = 27880381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27880381) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 602 + ... + 7491.

It is an arithmetic number, because the mean of its divisors is an integer number (2294649).

Almost surely, 2^27880385 is an apocalyptic number.

It is an amenable number.

27880385 is a deficient number, since it is larger than the sum of its proper divisors (8833999).

27880385 is a wasteful number, since it uses less digits than its factorization.

27880385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8164.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 27880385 is about 5280.1879701389. The cubic root of 27880385 is about 303.2258733255.

The spelling of 27880385 in words is "twenty-seven million, eight hundred eighty thousand, three hundred eighty-five".