28444516 has 12 divisors (see below), whose sum is σ = 49877100. Its totient is φ = 14193920.

The previous prime is 28444513. The next prime is 28444561. The reversal of 28444516 is 61544482.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 23136100 = 2304^2 + 4810^2 .

It is not an unprimeable number, because it can be changed into a prime (28444511) 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 in 3 ways as a sum of consecutive naturals, for example, 4741 + ... + 8908.

It is an arithmetic number, because the mean of its divisors is an integer number (4156425).

Almost surely, 2^28444516 is an apocalyptic number.

It is an amenable number.

28444516 is a deficient number, since it is larger than the sum of its proper divisors (21432584).

28444516 is a wasteful number, since it uses less digits than its factorization.

28444516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14174 (or 14172 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 28444516 is about 5333.3400416624. The cubic root of 28444516 is about 305.2573873182.

Subtracting from 28444516 its sum of digits (34), we obtain a palindrome (28444482).

Adding to 28444516 its reverse (61544482), we get a palindrome (89988998).

The spelling of 28444516 in words is "twenty-eight million, four hundred forty-four thousand, five hundred sixteen".