28250799 has 4 divisors (see below), whose sum is σ = 37667736. Its totient is φ = 18833864.

The previous prime is 28250779. The next prime is 28250809. The reversal of 28250799 is 99705282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28250799 - 2¹¹ = 28248751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28250799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28250779) 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, 4708464 + ... + 4708469.

It is an arithmetic number, because the mean of its divisors is an integer number (9416934).

Almost surely, 2^28250799 is an apocalyptic number.

28250799 is a deficient number, since it is larger than the sum of its proper divisors (9416937).

28250799 is an equidigital number, since it uses as much as digits as its factorization.

28250799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416936.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 28250799 is about 5315.1480694332. The cubic root of 28250799 is about 304.5628387276.

The spelling of 28250799 in words is "twenty-eight million, two hundred fifty thousand, seven hundred ninety-nine".