28044004 has 6 divisors (see below), whose sum is σ = 49077014. Its totient is φ = 14022000.

The previous prime is 28043993. The next prime is 28044011. The reversal of 28044004 is 40044082.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 1004004 = 5200^2 + 1002^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3505497 + ... + 3505504.

Almost surely, 2^28044004 is an apocalyptic number.

It is an amenable number.

28044004 is a deficient number, since it is larger than the sum of its proper divisors (21033010).

28044004 is a wasteful number, since it uses less digits than its factorization.

28044004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011005 (or 7011003 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 28044004 is about 5295.6589769357. The cubic root of 28044004 is about 303.8178878105.

Adding to 28044004 its reverse (40044082), we get a palindrome (68088086).

The spelling of 28044004 in words is "twenty-eight million, forty-four thousand, four".