128433481 has 8 divisors (see below), whose sum is σ = 141470784. Its totient is φ = 115623120.

The previous prime is 128433457. The next prime is 128433493. The reversal of 128433481 is 184334821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128433481 is a prime.

It is a super-2 number, since 2×128433481² = 32990318083554722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128433881) 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, 55546 + ... + 57811.

It is an arithmetic number, because the mean of its divisors is an integer number (17683848).

Almost surely, 2^128433481 is an apocalyptic number.

128433481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

128433481 is a deficient number, since it is larger than the sum of its proper divisors (13037303).

128433481 is a wasteful number, since it uses less digits than its factorization.

128433481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113471.

The product of its digits is 18432, while the sum is 34.

The square root of 128433481 is about 11332.8496416391. The cubic root of 128433481 is about 504.5366871108.

It can be divided in two parts, 1 and 28433481, that added together give a palindrome (28433482).

The spelling of 128433481 in words is "one hundred twenty-eight million, four hundred thirty-three thousand, four hundred eighty-one".