128814389 has 16 divisors (see below), whose sum is σ = 149506560. Its totient is φ = 109685760.

The previous prime is 128814383. The next prime is 128814397. The reversal of 128814389 is 983418821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128814389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128814383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40157 + ... + 43245.

It is an arithmetic number, because the mean of its divisors is an integer number (9344160).

Almost surely, 2^128814389 is an apocalyptic number.

It is an amenable number.

128814389 is a deficient number, since it is larger than the sum of its proper divisors (20692171).

128814389 is a wasteful number, since it uses less digits than its factorization.

128814389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340.

The product of its digits is 110592, while the sum is 44.

The square root of 128814389 is about 11349.6426816002. The cubic root of 128814389 is about 505.0349797683.

The spelling of 128814389 in words is "one hundred twenty-eight million, eight hundred fourteen thousand, three hundred eighty-nine".