27640893 has 16 divisors (see below), whose sum is σ = 42277376. Its totient is φ = 15735600.

The previous prime is 27640883. The next prime is 27640897. The reversal of 27640893 is 39804672.

It is not a de Polignac number, because 27640893 - 2¹⁶ = 27575357 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27640897) 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, 3618 + ... + 8268.

It is an arithmetic number, because the mean of its divisors is an integer number (2642336).

Almost surely, 2^27640893 is an apocalyptic number.

It is an amenable number.

27640893 is a deficient number, since it is larger than the sum of its proper divisors (14636483).

27640893 is a wasteful number, since it uses less digits than its factorization.

27640893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 27640893 is about 5257.4606988545. The cubic root of 27640893 is about 302.3551404405.

The spelling of 27640893 in words is "twenty-seven million, six hundred forty thousand, eight hundred ninety-three".