28022799 has 16 divisors (see below), whose sum is σ = 43695872. Its totient is φ = 15640128.

The previous prime is 28022789. The next prime is 28022831. The reversal of 28022799 is 99722082.

It is not a de Polignac number, because 28022799 - 2⁹ = 28022287 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 (28022759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14614 + ... + 16419.

It is an arithmetic number, because the mean of its divisors is an integer number (2730992).

Almost surely, 2^28022799 is an apocalyptic number.

28022799 is a deficient number, since it is larger than the sum of its proper divisors (15673073).

28022799 is a wasteful number, since it uses less digits than its factorization.

28022799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31086.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28022799 is about 5293.6564867774. The cubic root of 28022799 is about 303.7412929137.

The spelling of 28022799 in words is "twenty-eight million, twenty-two thousand, seven hundred ninety-nine".