128339793 has 12 divisors (see below), whose sum is σ = 193440000. Its totient is φ = 81839736.

The previous prime is 128339779. The next prime is 128339797. The reversal of 128339793 is 397933821.

It is not a de Polignac number, because 128339793 - 2¹⁴ = 128323409 is a prime.

It is a super-2 number, since 2×128339793² = 32942204934565698, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (128339797) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309793 + ... + 310206.

It is an arithmetic number, because the mean of its divisors is an integer number (16120000).

Almost surely, 2^128339793 is an apocalyptic number.

It is an amenable number.

128339793 is a deficient number, since it is larger than the sum of its proper divisors (65100207).

128339793 is a wasteful number, since it uses less digits than its factorization.

128339793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620028 (or 620025 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 128339793 is about 11328.7154170277. The cubic root of 128339793 is about 504.4139762954.

The spelling of 128339793 in words is "one hundred twenty-eight million, three hundred thirty-nine thousand, seven hundred ninety-three".