128338047 has 32 divisors (see below), whose sum is σ = 198236160. Its totient is φ = 81967680.

The previous prime is 128338033. The next prime is 128338051. The reversal of 128338047 is 740833821.

It is not a de Polignac number, because 128338047 - 2¹⁰ = 128337023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128438047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88843 + ... + 90275.

It is an arithmetic number, because the mean of its divisors is an integer number (6194880).

Almost surely, 2^128338047 is an apocalyptic number.

128338047 is a deficient number, since it is larger than the sum of its proper divisors (69898113).

128338047 is a wasteful number, since it uses less digits than its factorization.

128338047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1574 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 128338047 is about 11328.6383559543. The cubic root of 128338047 is about 504.4116888501.

The spelling of 128338047 in words is "one hundred twenty-eight million, three hundred thirty-eight thousand, forty-seven".