128843898 has 16 divisors (see below), whose sum is σ = 258383136. Its totient is φ = 42832080.

The previous prime is 128843863. The next prime is 128843903. The reversal of 128843898 is 898348821.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128843898.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26548 + ... + 31023.

It is an arithmetic number, because the mean of its divisors is an integer number (16148946).

Almost surely, 2^128843898 is an apocalyptic number.

128843898 is an abundant number, since it is smaller than the sum of its proper divisors (129539238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128843898 is a wasteful number, since it uses less digits than its factorization.

128843898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57949.

The product of its digits is 884736, while the sum is 51.

The square root of 128843898 is about 11350.9426040307. The cubic root of 128843898 is about 505.0735415560.

The spelling of 128843898 in words is "one hundred twenty-eight million, eight hundred forty-three thousand, eight hundred ninety-eight".