128840343 has 8 divisors (see below), whose sum is σ = 171861888. Its totient is φ = 85856184.

The previous prime is 128840339. The next prime is 128840353. The reversal of 128840343 is 343048821.

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

It is not a de Polignac number, because 128840343 - 2² = 128840339 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128840353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46 + ... + 16052.

It is an arithmetic number, because the mean of its divisors is an integer number (21482736).

Almost surely, 2^128840343 is an apocalyptic number.

128840343 is a deficient number, since it is larger than the sum of its proper divisors (43021545).

128840343 is a wasteful number, since it uses less digits than its factorization.

128840343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18693.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 128840343 is about 11350.7860080261. The cubic root of 128840343 is about 505.0688962630.

The spelling of 128840343 in words is "one hundred twenty-eight million, eight hundred forty thousand, three hundred forty-three".