28072204 has 12 divisors (see below), whose sum is σ = 49215544. Its totient is φ = 14010624.

The previous prime is 28072201. The next prime is 28072211. The reversal of 28072204 is 40227082.

It is not an unprimeable number, because it can be changed into a prime (28072201) 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, 3774 + ... + 8389.

Almost surely, 2^28072204 is an apocalyptic number.

It is an amenable number.

28072204 is a deficient number, since it is larger than the sum of its proper divisors (21143340).

28072204 is a wasteful number, since it uses less digits than its factorization.

28072204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12744 (or 12742 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 28072204 is about 5298.3208660858. The cubic root of 28072204 is about 303.9196896582.

Adding to 28072204 its reverse (40227082), we get a palindrome (68299286).

The spelling of 28072204 in words is "twenty-eight million, seventy-two thousand, two hundred four".