27728445 has 16 divisors (see below), whose sum is σ = 46975680. Its totient is φ = 13918464.

The previous prime is 27728431. The next prime is 27728473. The reversal of 27728445 is 54482772.

It is not a de Polignac number, because 27728445 - 2⁵ = 27728413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54115 + ... + 54624.

It is an arithmetic number, because the mean of its divisors is an integer number (2935980).

Almost surely, 2^27728445 is an apocalyptic number.

It is an amenable number.

27728445 is a deficient number, since it is larger than the sum of its proper divisors (19247235).

27728445 is a wasteful number, since it uses less digits than its factorization.

27728445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108764.

The product of its digits is 125440, while the sum is 39.

The square root of 27728445 is about 5265.7805689185. The cubic root of 27728445 is about 302.6740386842.

The spelling of 27728445 in words is "twenty-seven million, seven hundred twenty-eight thousand, four hundred forty-five".