128904433 has 8 divisors (see below), whose sum is σ = 147390080. Its totient is φ = 110436480.

The previous prime is 128904383. The next prime is 128904437. The reversal of 128904433 is 334409821.

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

It is not a de Polignac number, because 128904433 - 2¹⁷ = 128773361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128904437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20788 + ... + 26266.

It is an arithmetic number, because the mean of its divisors is an integer number (18423760).

Almost surely, 2^128904433 is an apocalyptic number.

It is an amenable number.

128904433 is a deficient number, since it is larger than the sum of its proper divisors (18485647).

128904433 is an equidigital number, since it uses as much as digits as its factorization.

128904433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8847.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 128904433 is about 11353.6088095372. The cubic root of 128904433 is about 505.1526290933.

The spelling of 128904433 in words is "one hundred twenty-eight million, nine hundred four thousand, four hundred thirty-three".