28128067 has 8 divisors (see below), whose sum is σ = 31675392. Its totient is φ = 24745800.

The previous prime is 28128059. The next prime is 28128077. The reversal of 28128067 is 76082182.

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

It is a cyclic number.

It is not a de Polignac number, because 28128067 - 2³ = 28128059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28128017) 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 7 ways as a sum of consecutive naturals, for example, 40903 + ... + 41584.

It is an arithmetic number, because the mean of its divisors is an integer number (3959424).

Almost surely, 2^28128067 is an apocalyptic number.

28128067 is a deficient number, since it is larger than the sum of its proper divisors (3547325).

28128067 is a wasteful number, since it uses less digits than its factorization.

28128067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82529.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28128067 is about 5303.5900105495. The cubic root of 28128067 is about 304.1211536664.

The spelling of 28128067 in words is "twenty-eight million, one hundred twenty-eight thousand, sixty-seven".