128387098839 has 8 divisors (see below), whose sum is σ = 171348838272. Its totient is φ = 85508379320.

The previous prime is 128387098817. The next prime is 128387098843. The reversal of 128387098839 is 938890783821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128387098839 - 2⁸ = 128387098583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128387098839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128387098639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20751369 + ... + 20757554.

It is an arithmetic number, because the mean of its divisors is an integer number (21418604784).

Almost surely, 2^128387098839 is an apocalyptic number.

128387098839 is a deficient number, since it is larger than the sum of its proper divisors (42961739433).

128387098839 is a wasteful number, since it uses less digits than its factorization.

128387098839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41509957.

The product of its (nonzero) digits is 41803776, while the sum is 66.

The spelling of 128387098839 in words is "one hundred twenty-eight billion, three hundred eighty-seven million, ninety-eight thousand, eight hundred thirty-nine".