128841998 has 16 divisors (see below), whose sum is σ = 202175136. Its totient is φ = 61464480.

The previous prime is 128841989. The next prime is 128842009. The reversal of 128841998 is 899148821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16040 + ... + 22692.

It is an arithmetic number, because the mean of its divisors is an integer number (12635946).

Almost surely, 2^128841998 is an apocalyptic number.

128841998 is a deficient number, since it is larger than the sum of its proper divisors (73333138).

128841998 is a wasteful number, since it uses less digits than its factorization.

128841998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7099.

The product of its digits is 331776, while the sum is 50.

The square root of 128841998 is about 11350.8589102323. The cubic root of 128841998 is about 505.0710588503.

The spelling of 128841998 in words is "one hundred twenty-eight million, eight hundred forty-one thousand, nine hundred ninety-eight".