28704328 has 8 divisors (see below), whose sum is σ = 53820630. Its totient is φ = 14352160.

The previous prime is 28704317. The next prime is 28704353. The reversal of 28704328 is 82340782.

It can be written as a sum of positive squares in only one way, i.e., 27060804 + 1643524 = 5202^2 + 1282^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28704293 and 28704302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1794013 + ... + 1794028.

Almost surely, 2^28704328 is an apocalyptic number.

It is an amenable number.

28704328 is a deficient number, since it is larger than the sum of its proper divisors (25116302).

28704328 is a wasteful number, since it uses less digits than its factorization.

28704328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588047 (or 3588043 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28704328 is about 5357.6420186496. The cubic root of 28704328 is about 306.1839781044.

The spelling of 28704328 in words is "twenty-eight million, seven hundred four thousand, three hundred twenty-eight".