28279844 has 12 divisors (see below), whose sum is σ = 50301468. Its totient is φ = 13908000.

The previous prime is 28279813. The next prime is 28279859. The reversal of 28279844 is 44897282.

It can be written as a sum of positive squares in 2 ways, for example, as 506944 + 27772900 = 712^2 + 5270^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28279795 and 28279804.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 57707 + ... + 58194.

It is an arithmetic number, because the mean of its divisors is an integer number (4191789).

Almost surely, 2^28279844 is an apocalyptic number.

It is an amenable number.

28279844 is a deficient number, since it is larger than the sum of its proper divisors (22021624).

28279844 is a wasteful number, since it uses less digits than its factorization.

28279844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115966 (or 115964 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28279844 is about 5317.8796526435. The cubic root of 28279844 is about 304.6671779337.

The spelling of 28279844 in words is "twenty-eight million, two hundred seventy-nine thousand, eight hundred forty-four".