27945291 has 32 divisors (see below), whose sum is σ = 42762240. Its totient is φ = 16077600.

The previous prime is 27945283. The next prime is 27945317. The reversal of 27945291 is 19254972.

It is not a de Polignac number, because 27945291 - 2³ = 27945283 is a prime.

Its product of digits (45360) is a multiple of the sum of its prime divisors (567).

It is not an unprimeable number, because it can be changed into a prime (27945221) 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 31 ways as a sum of consecutive naturals, for example, 60126 + ... + 60588.

It is an arithmetic number, because the mean of its divisors is an integer number (1336320).

Almost surely, 2^27945291 is an apocalyptic number.

27945291 is a deficient number, since it is larger than the sum of its proper divisors (14816949).

27945291 is a wasteful number, since it uses less digits than its factorization.

27945291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567.

The product of its digits is 45360, while the sum is 39.

The square root of 27945291 is about 5286.3305799013. The cubic root of 27945291 is about 303.4609959222.

The spelling of 27945291 in words is "twenty-seven million, nine hundred forty-five thousand, two hundred ninety-one".