28064147 has 4 divisors (see below), whose sum is σ = 28139760. Its totient is φ = 27988536.

The previous prime is 28064111. The next prime is 28064171. The reversal of 28064147 is 74146082.

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

It is a cyclic number.

It is not a de Polignac number, because 28064147 - 2⁸ = 28063891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28064447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37247 + ... + 37992.

It is an arithmetic number, because the mean of its divisors is an integer number (7034940).

Almost surely, 2^28064147 is an apocalyptic number.

28064147 is a deficient number, since it is larger than the sum of its proper divisors (75613).

28064147 is an equidigital number, since it uses as much as digits as its factorization.

28064147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75612.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28064147 is about 5297.5604762947. The cubic root of 28064147 is about 303.8906108911.

The spelling of 28064147 in words is "twenty-eight million, sixty-four thousand, one hundred forty-seven".