28084445 has 8 divisors (see below), whose sum is σ = 33800544. Its totient is φ = 22401424.

The previous prime is 28084439. The next prime is 28084447. The reversal of 28084445 is 54448082.

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 28084445 - 2⁴ = 28084429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084447) 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, 6359 + ... + 9828.

It is an arithmetic number, because the mean of its divisors is an integer number (4225068).

Almost surely, 2^28084445 is an apocalyptic number.

It is an amenable number.

28084445 is a deficient number, since it is larger than the sum of its proper divisors (5716099).

28084445 is a wasteful number, since it uses less digits than its factorization.

28084445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16539.

The product of its (nonzero) digits is 40960, while the sum is 35.

The square root of 28084445 is about 5299.4759174847. The cubic root of 28084445 is about 303.9638583823.

The spelling of 28084445 in words is "twenty-eight million, eighty-four thousand, four hundred forty-five".