128443047 has 16 divisors (see below), whose sum is σ = 174152448. Its totient is φ = 84188160.

The previous prime is 128443043. The next prime is 128443067. The reversal of 128443047 is 740344821.

It is not a de Polignac number, because 128443047 - 2² = 128443043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128442999 and 128443017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128443043) 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 15 ways as a sum of consecutive naturals, for example, 110823 + ... + 111975.

It is an arithmetic number, because the mean of its divisors is an integer number (10884528).

Almost surely, 2^128443047 is an apocalyptic number.

128443047 is a deficient number, since it is larger than the sum of its proper divisors (45709401).

128443047 is a wasteful number, since it uses less digits than its factorization.

128443047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 128443047 is about 11333.2716812049. The cubic root of 128443047 is about 504.5492131232.

Adding to 128443047 its reverse (740344821), we get a palindrome (868787868).

The spelling of 128443047 in words is "one hundred twenty-eight million, four hundred forty-three thousand, forty-seven".