28223051109 has 64 divisors (see below), whose sum is σ = 44299664640. Its totient is φ = 15791616000.

The previous prime is 28223051107. The next prime is 28223051191. The reversal of 28223051109 is 90115032282.

It is a happy number.

It is not a de Polignac number, because 28223051109 - 2¹ = 28223051107 is a prime.

It is a super-2 number, since 2×28223051109² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 28223051109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223051107) 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 63 ways as a sum of consecutive naturals, for example, 15774987 + ... + 15776775.

It is an arithmetic number, because the mean of its divisors is an integer number (692182260).

Almost surely, 2^28223051109 is an apocalyptic number.

It is an amenable number.

28223051109 is a deficient number, since it is larger than the sum of its proper divisors (16076613531).

28223051109 is a wasteful number, since it uses less digits than its factorization.

28223051109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 28223051109 in words is "twenty-eight billion, two hundred twenty-three million, fifty-one thousand, one hundred nine".