28678503 has 16 divisors (see below), whose sum is σ = 45111296. Its totient is φ = 15858720.

The previous prime is 28678483. The next prime is 28678511. The reversal of 28678503 is 30587682.

It is not a de Polignac number, because 28678503 - 2⁵ = 28678471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21376 + ... + 22677.

It is an arithmetic number, because the mean of its divisors is an integer number (2819456).

Almost surely, 2^28678503 is an apocalyptic number.

28678503 is a deficient number, since it is larger than the sum of its proper divisors (16432793).

28678503 is a wasteful number, since it uses less digits than its factorization.

28678503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44094.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28678503 is about 5355.2313675508. The cubic root of 28678503 is about 306.0921269875.

The spelling of 28678503 in words is "twenty-eight million, six hundred seventy-eight thousand, five hundred three".