27728906 has 8 divisors (see below), whose sum is σ = 41741184. Its totient is φ = 13815180.

The previous prime is 27728903. The next prime is 27728917. The reversal of 27728906 is 60982772.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27728903) 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, 23930 + ... + 25061.

It is an arithmetic number, because the mean of its divisors is an integer number (5217648).

Almost surely, 2^27728906 is an apocalyptic number.

27728906 is a deficient number, since it is larger than the sum of its proper divisors (14012278).

27728906 is a wasteful number, since it uses less digits than its factorization.

27728906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49276.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 27728906 is about 5265.8243419241. The cubic root of 27728906 is about 302.6757160467.

The spelling of 27728906 in words is "twenty-seven million, seven hundred twenty-eight thousand, nine hundred six".