27782945 has 8 divisors (see below), whose sum is σ = 34115136. Its totient is φ = 21709296.

The previous prime is 27782927. The next prime is 27782977. The reversal of 27782945 is 54928772.

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 27782945 - 2²² = 23588641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27782896 and 27782905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64397 + ... + 64826.

It is an arithmetic number, because the mean of its divisors is an integer number (4264392).

Almost surely, 2^27782945 is an apocalyptic number.

It is an amenable number.

27782945 is a deficient number, since it is larger than the sum of its proper divisors (6332191).

27782945 is a wasteful number, since it uses less digits than its factorization.

27782945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129271.

The product of its digits is 282240, while the sum is 44.

The square root of 27782945 is about 5270.9529498944. The cubic root of 27782945 is about 302.8722099062.

The spelling of 27782945 in words is "twenty-seven million, seven hundred eighty-two thousand, nine hundred forty-five".