28560803 has 4 divisors (see below), whose sum is σ = 28710528. Its totient is φ = 28411080.

The previous prime is 28560797. The next prime is 28560811. The reversal of 28560803 is 30806582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30806582 = 2 ⋅15403291.

It is a cyclic number.

It is not a de Polignac number, because 28560803 - 2¹² = 28556707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28560803.

It is not an unprimeable number, because it can be changed into a prime (28560823) 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, 74576 + ... + 74957.

It is an arithmetic number, because the mean of its divisors is an integer number (7177632).

Almost surely, 2^28560803 is an apocalyptic number.

28560803 is a deficient number, since it is larger than the sum of its proper divisors (149725).

28560803 is a wasteful number, since it uses less digits than its factorization.

28560803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149724.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28560803 is about 5344.2308146262. The cubic root of 28560803 is about 305.6728066059.

The spelling of 28560803 in words is "twenty-eight million, five hundred sixty thousand, eight hundred three".