128233433 has 4 divisors (see below), whose sum is σ = 128331828. Its totient is φ = 128135040.

The previous prime is 128233429. The next prime is 128233463. The reversal of 128233433 is 334332821.

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 117787609 + 10445824 = 10853^2 + 3232^2 .

It is a cyclic number.

It is not a de Polignac number, because 128233433 - 2² = 128233429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128233396 and 128233405.

It is not an unprimeable number, because it can be changed into a prime (128233403) 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 3 ways as a sum of consecutive naturals, for example, 47216 + ... + 49857.

It is an arithmetic number, because the mean of its divisors is an integer number (32082957).

Almost surely, 2^128233433 is an apocalyptic number.

It is an amenable number.

128233433 is a deficient number, since it is larger than the sum of its proper divisors (98395).

128233433 is an equidigital number, since it uses as much as digits as its factorization.

128233433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98394.

The product of its digits is 10368, while the sum is 29.

The square root of 128233433 is about 11324.0201783642. The cubic root of 128233433 is about 504.2745955247.

The spelling of 128233433 in words is "one hundred twenty-eight million, two hundred thirty-three thousand, four hundred thirty-three".