28680863 has 8 divisors (see below), whose sum is σ = 29084832. Its totient is φ = 28279296.

The previous prime is 28680829. The next prime is 28680881. The reversal of 28680863 is 36808682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28680863 - 2¹⁴ = 28664479 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 28680863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28680163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44006 + ... + 44652.

It is an arithmetic number, because the mean of its divisors is an integer number (3635604).

Almost surely, 2^28680863 is an apocalyptic number.

28680863 is a deficient number, since it is larger than the sum of its proper divisors (403969).

28680863 is an equidigital number, since it uses as much as digits as its factorization.

28680863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28680863 is about 5355.4517083062. The cubic root of 28680863 is about 306.1005230278.

The spelling of 28680863 in words is "twenty-eight million, six hundred eighty thousand, eight hundred sixty-three".