27806906 has 12 divisors (see below), whose sum is σ = 42907662. Its totient is φ = 13505616.

The previous prime is 27806903. The next prime is 27806921. The reversal of 27806906 is 60960872.

It can be written as a sum of positive squares in 3 ways, for example, as 10923025 + 16883881 = 3305^2 + 4109^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27806906.

It is not an unprimeable number, because it can be changed into a prime (27806903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45056 + ... + 45668.

Almost surely, 2^27806906 is an apocalyptic number.

27806906 is a deficient number, since it is larger than the sum of its proper divisors (15100756).

27806906 is an frugal number, since it uses more digits than its factorization.

27806906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 27806906 is about 5273.2253886971. The cubic root of 27806906 is about 302.9592541433.

The spelling of 27806906 in words is "twenty-seven million, eight hundred six thousand, nine hundred six".