27564945 has 8 divisors (see below), whose sum is σ = 44103936. Its totient is φ = 14701296.

The previous prime is 27564937. The next prime is 27564947. The reversal of 27564945 is 54946572.

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

It is not a de Polignac number, because 27564945 - 2³ = 27564937 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 27564897 and 27564906.

It is not an unprimeable number, because it can be changed into a prime (27564947) 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, 918817 + ... + 918846.

It is an arithmetic number, because the mean of its divisors is an integer number (5512992).

Almost surely, 2^27564945 is an apocalyptic number.

It is an amenable number.

27564945 is a deficient number, since it is larger than the sum of its proper divisors (16538991).

27564945 is a wasteful number, since it uses less digits than its factorization.

27564945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837671.

The product of its digits is 302400, while the sum is 42.

The square root of 27564945 is about 5250.2328519790. The cubic root of 27564945 is about 302.0779625627.

The spelling of 27564945 in words is "twenty-seven million, five hundred sixty-four thousand, nine hundred forty-five".