27945555 has 48 divisors (see below), whose sum is σ = 49986720. Its totient is φ = 13319680.

The previous prime is 27945551. The next prime is 27945563. The reversal of 27945555 is 55554972.

It is not a de Polignac number, because 27945555 - 2² = 27945551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27945551) 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 47 ways as a sum of consecutive naturals, for example, 161449 + ... + 161621.

It is an arithmetic number, because the mean of its divisors is an integer number (1041390).

Almost surely, 2^27945555 is an apocalyptic number.

27945555 is a deficient number, since it is larger than the sum of its proper divisors (22041165).

27945555 is a wasteful number, since it uses less digits than its factorization.

27945555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 281 counting only the distinct ones).

The product of its digits is 315000, while the sum is 42.

The square root of 27945555 is about 5286.3555499039. The cubic root of 27945555 is about 303.4619515209.

The spelling of 27945555 in words is "twenty-seven million, nine hundred forty-five thousand, five hundred fifty-five".