43128403 has 8 divisors (see below), whose sum is σ = 43943616. Its totient is φ = 42316800.

The previous prime is 43128389. The next prime is 43128451. The reversal of 43128403 is 30482134.

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-43128403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43128103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38550 + ... + 39652.

It is an arithmetic number, because the mean of its divisors is an integer number (5492952).

Almost surely, 2^43128403 is an apocalyptic number.

43128403 is a deficient number, since it is larger than the sum of its proper divisors (815213).

43128403 is a wasteful number, since it uses less digits than its factorization.

43128403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 43128403 is about 6567.2218631625. The cubic root of 43128403 is about 350.6881779747.

The spelling of 43128403 in words is "forty-three million, one hundred twenty-eight thousand, four hundred three".