27561538 has 8 divisors (see below), whose sum is σ = 42303888. Its totient is φ = 13460244.

The previous prime is 27561529. The next prime is 27561563. The reversal of 27561538 is 83516572.

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

It is a junction number, because it is equal to n+sod(n) for n = 27561497 and 27561506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160156 + ... + 160327.

It is an arithmetic number, because the mean of its divisors is an integer number (5287986).

Almost surely, 2^27561538 is an apocalyptic number.

27561538 is a deficient number, since it is larger than the sum of its proper divisors (14742350).

27561538 is a wasteful number, since it uses less digits than its factorization.

27561538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320528.

The product of its digits is 50400, while the sum is 37.

The square root of 27561538 is about 5249.9083801529. The cubic root of 27561538 is about 302.0655165372.

It can be divided in two parts, 275615 and 38, that added together give a triangular number (275653 = T₇₄₂).

The spelling of 27561538 in words is "twenty-seven million, five hundred sixty-one thousand, five hundred thirty-eight".