28044804 has 12 divisors (see below), whose sum is σ = 65437904. Its totient is φ = 9348264.

The previous prime is 28044767. The next prime is 28044823. The reversal of 28044804 is 40844082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×28044804² = 1573022062796832, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1168522 + ... + 1168545.

Almost surely, 2^28044804 is an apocalyptic number.

It is an amenable number.

28044804 is an abundant number, since it is smaller than the sum of its proper divisors (37393100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28044804 is a wasteful number, since it uses less digits than its factorization.

28044804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337074 (or 2337072 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 28044804 is about 5295.7345099618. The cubic root of 28044804 is about 303.8207767466.

Adding to 28044804 its reverse (40844082), we get a palindrome (68888886).

The spelling of 28044804 in words is "twenty-eight million, forty-four thousand, eight hundred four".