28085444 has 6 divisors (see below), whose sum is σ = 49149534. Its totient is φ = 14042720.

The previous prime is 28085443. The next prime is 28085459. The reversal of 28085444 is 44458082.

It can be written as a sum of positive squares in only one way, i.e., 27962944 + 122500 = 5288^2 + 350^2 .

It is not an unprimeable number, because it can be changed into a prime (28085441) 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 as a sum of consecutive naturals, namely, 3510677 + ... + 3510684.

It is an arithmetic number, because the mean of its divisors is an integer number (8191589).

Almost surely, 2^28085444 is an apocalyptic number.

It is an amenable number.

28085444 is a deficient number, since it is larger than the sum of its proper divisors (21064090).

28085444 is a wasteful number, since it uses less digits than its factorization.

28085444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021365 (or 7021363 counting only the distinct ones).

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

The square root of 28085444 is about 5299.5701712497. The cubic root of 28085444 is about 303.9674624687.

The spelling of 28085444 in words is "twenty-eight million, eighty-five thousand, four hundred forty-four".