27680905 has 8 divisors (see below), whose sum is σ = 37962432. Its totient is φ = 18981168.

The previous prime is 27680903. The next prime is 27680909. The reversal of 27680905 is 50908672.

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

It is a cyclic number.

It is not a de Polignac number, because 27680905 - 2¹ = 27680903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27680903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395407 + ... + 395476.

It is an arithmetic number, because the mean of its divisors is an integer number (4745304).

Almost surely, 2^27680905 is an apocalyptic number.

It is an amenable number.

27680905 is a deficient number, since it is larger than the sum of its proper divisors (10281527).

27680905 is an equidigital number, since it uses as much as digits as its factorization.

27680905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790895.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 27680905 is about 5261.2645818282. The cubic root of 27680905 is about 302.5009630459.

The spelling of 27680905 in words is "twenty-seven million, six hundred eighty thousand, nine hundred five".