27691906 has 8 divisors (see below), whose sum is σ = 45314064. Its totient is φ = 12587220.

The previous prime is 27691901. The next prime is 27691913. The reversal of 27691906 is 60919672.

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

It is not an unprimeable number, because it can be changed into a prime (27691901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629340 + ... + 629383.

It is an arithmetic number, because the mean of its divisors is an integer number (5664258).

Almost surely, 2^27691906 is an apocalyptic number.

27691906 is a deficient number, since it is larger than the sum of its proper divisors (17622158).

27691906 is a wasteful number, since it uses less digits than its factorization.

27691906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258736.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 27691906 is about 5262.3099490623. The cubic root of 27691906 is about 302.5410312487.

The spelling of 27691906 in words is "twenty-seven million, six hundred ninety-one thousand, nine hundred six".