28680799 has 4 divisors (see below), whose sum is σ = 32778064. Its totient is φ = 24583536.

The previous prime is 28680781. The next prime is 28680811. The reversal of 28680799 is 99708682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99708682 = 2 ⋅49854341.

It is a cyclic number.

It is not a de Polignac number, because 28680799 - 2²³ = 20292191 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 (28680749) 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, 2048622 + ... + 2048635.

It is an arithmetic number, because the mean of its divisors is an integer number (8194516).

Almost surely, 2^28680799 is an apocalyptic number.

28680799 is a deficient number, since it is larger than the sum of its proper divisors (4097265).

28680799 is an equidigital number, since it uses as much as digits as its factorization.

28680799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097264.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 28680799 is about 5355.4457330833. The cubic root of 28680799 is about 306.1002953447.

The spelling of 28680799 in words is "twenty-eight million, six hundred eighty thousand, seven hundred ninety-nine".