27940561 has 8 divisors (see below), whose sum is σ = 31806144. Its totient is φ = 24295920.

The previous prime is 27940547. The next prime is 27940573. The reversal of 27940561 is 16504972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27940561 - 2¹³ = 27932369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27940261) 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 7 ways as a sum of consecutive naturals, for example, 54966 + ... + 55471.

It is an arithmetic number, because the mean of its divisors is an integer number (3975768).

Almost surely, 2^27940561 is an apocalyptic number.

It is an amenable number.

27940561 is a deficient number, since it is larger than the sum of its proper divisors (3865583).

27940561 is a wasteful number, since it uses less digits than its factorization.

27940561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110471.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 27940561 is about 5285.8831806993. The cubic root of 27940561 is about 303.4438737590.

The spelling of 27940561 in words is "twenty-seven million, nine hundred forty thousand, five hundred sixty-one".