128799 has 12 divisors (see below), whose sum is σ = 203112. Its totient is φ = 78000.

The previous prime is 128767. The next prime is 128813. The reversal of 128799 is 997821.

It is a happy number.

It is not a de Polignac number, because 128799 - 2⁵ = 128767 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 1287 and 99 contains 128799 itself.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 552 + ... + 749.

It is an arithmetic number, because the mean of its divisors is an integer number (16926).

2¹²⁸⁷⁹⁹ is an apocalyptic number.

128799 is a deficient number, since it is larger than the sum of its proper divisors (74313).

128799 is a wasteful number, since it uses less digits than its factorization.

128799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1315 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 128799 is about 358.8857757003. The cubic root of 128799 is about 50.5014867386.

The spelling of 128799 in words is "one hundred twenty-eight thousand, seven hundred ninety-nine".