28045799 has 4 divisors (see below), whose sum is σ = 28059960. Its totient is φ = 28031640.

The previous prime is 28045747. The next prime is 28045811. The reversal of 28045799 is 99754082.

It is a happy number.

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 28045799 - 2¹² = 28041703 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 (28045499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3509 + ... + 8270.

It is an arithmetic number, because the mean of its divisors is an integer number (7014990).

Almost surely, 2^28045799 is an apocalyptic number.

28045799 is a deficient number, since it is larger than the sum of its proper divisors (14161).

28045799 is a wasteful number, since it uses less digits than its factorization.

28045799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14160.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 28045799 is about 5295.8284526597. The cubic root of 28045799 is about 303.8243697841.

The spelling of 28045799 in words is "twenty-eight million, forty-five thousand, seven hundred ninety-nine".