28304972 has 12 divisors (see below), whose sum is σ = 49704816. Its totient is φ = 14103600.

The previous prime is 28304971. The next prime is 28304993. The reversal of 28304972 is 27940382.

It is not an unprimeable number, because it can be changed into a prime (28304971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10904 + ... + 13247.

It is an arithmetic number, because the mean of its divisors is an integer number (4142068).

Almost surely, 2^28304972 is an apocalyptic number.

It is an amenable number.

28304972 is a deficient number, since it is larger than the sum of its proper divisors (21399844).

28304972 is a wasteful number, since it uses less digits than its factorization.

28304972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24448 (or 24446 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 28304972 is about 5320.2417238317. The cubic root of 28304972 is about 304.7573883616.

The spelling of 28304972 in words is "twenty-eight million, three hundred four thousand, nine hundred seventy-two".