28464128233 has 4 divisors (see below), whose sum is σ = 28930753348. Its totient is φ = 27997503120.

The previous prime is 28464128201. The next prime is 28464128249. The reversal of 28464128233 is 33282146482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6867768384 + 21596359849 = 82872^2 + 146957^2 .

It is a cyclic number.

It is not a de Polignac number, because 28464128233 - 2⁵ = 28464128201 is a prime.

It is a super-3 number, since 3×28464128233³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28464128233.

It is not an unprimeable number, because it can be changed into a prime (28464128533) 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 3 ways as a sum of consecutive naturals, for example, 233312466 + ... + 233312587.

It is an arithmetic number, because the mean of its divisors is an integer number (7232688337).

Almost surely, 2^28464128233 is an apocalyptic number.

It is an amenable number.

28464128233 is a deficient number, since it is larger than the sum of its proper divisors (466625115).

28464128233 is an equidigital number, since it uses as much as digits as its factorization.

28464128233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466625114.

The product of its digits is 442368, while the sum is 43.

The spelling of 28464128233 in words is "twenty-eight billion, four hundred sixty-four million, one hundred twenty-eight thousand, two hundred thirty-three".