28128232433 has 8 divisors (see below), whose sum is σ = 32147624640. Its totient is φ = 24109108560.

The previous prime is 28128232417. The next prime is 28128232493. The reversal of 28128232433 is 33423282182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28128232433 - 2⁴ = 28128232417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28128232403) 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 7 ways as a sum of consecutive naturals, for example, 271463 + ... + 360483.

It is an arithmetic number, because the mean of its divisors is an integer number (4018453080).

Almost surely, 2^28128232433 is an apocalyptic number.

It is an amenable number.

28128232433 is a deficient number, since it is larger than the sum of its proper divisors (4019392207).

28128232433 is an equidigital number, since it uses as much as digits as its factorization.

28128232433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134167.

The product of its digits is 110592, while the sum is 38.

The spelling of 28128232433 in words is "twenty-eight billion, one hundred twenty-eight million, two hundred thirty-two thousand, four hundred thirty-three".