28338753433 has 4 divisors (see below), whose sum is σ = 28873446948. Its totient is φ = 27804059920.

The previous prime is 28338753427. The next prime is 28338753437. The reversal of 28338753433 is 33435783382.

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 12005146624 + 16333606809 = 109568^2 + 127803^2 .

It is a cyclic number.

It is not a de Polignac number, because 28338753433 - 2⁹ = 28338752921 is a prime.

It is a super-2 number, since 2×28338753433² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28338753437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267346678 + ... + 267346783.

It is an arithmetic number, because the mean of its divisors is an integer number (7218361737).

Almost surely, 2^28338753433 is an apocalyptic number.

It is an amenable number.

28338753433 is a deficient number, since it is larger than the sum of its proper divisors (534693515).

28338753433 is an equidigital number, since it uses as much as digits as its factorization.

28338753433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534693514.

The product of its digits is 4354560, while the sum is 49.

The spelling of 28338753433 in words is "twenty-eight billion, three hundred thirty-eight million, seven hundred fifty-three thousand, four hundred thirty-three".