128833998 has 16 divisors (see below), whose sum is σ = 257892096. Its totient is φ = 42907320.

The previous prime is 128833961. The next prime is 128834009. The reversal of 128833998 is 899338821.

It is a self number, because there is not a number n which added to its sum of digits gives 128833998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336 + ... + 16107.

It is an arithmetic number, because the mean of its divisors is an integer number (16118256).

Almost surely, 2^128833998 is an apocalyptic number.

128833998 is an abundant number, since it is smaller than the sum of its proper divisors (129058098).

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

128833998 is a wasteful number, since it uses less digits than its factorization.

128833998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18679.

The product of its digits is 746496, while the sum is 51.

The square root of 128833998 is about 11350.5065085220. The cubic root of 128833998 is about 505.0606050848.

The spelling of 128833998 in words is "one hundred twenty-eight million, eight hundred thirty-three thousand, nine hundred ninety-eight".