27561946 has 4 divisors (see below), whose sum is σ = 41342922. Its totient is φ = 13780972.

The previous prime is 27561931. The next prime is 27561949. The reversal of 27561946 is 64916572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 9541921 = 4245^2 + 3089^2 .

It is a Smith number, since the sum of its digits (40) 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 = 27561899 and 27561908.

It is not an unprimeable number, because it can be changed into a prime (27561949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6890485 + ... + 6890488.

Almost surely, 2^27561946 is an apocalyptic number.

27561946 is a deficient number, since it is larger than the sum of its proper divisors (13780976).

27561946 is a wasteful number, since it uses less digits than its factorization.

27561946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780975.

The product of its digits is 90720, while the sum is 40.

The square root of 27561946 is about 5249.9472378301. The cubic root of 27561946 is about 302.0670070458.

The spelling of 27561946 in words is "twenty-seven million, five hundred sixty-one thousand, nine hundred forty-six".