128800998 has 12 divisors (see below), whose sum is σ = 279068868. Its totient is φ = 42933660.

The previous prime is 128800979. The next prime is 128800999. The reversal of 128800998 is 899008821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128800999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3577788 + ... + 3577823.

It is an arithmetic number, because the mean of its divisors is an integer number (23255739).

Almost surely, 2^128800998 is an apocalyptic number.

128800998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128800998 is an abundant number, since it is smaller than the sum of its proper divisors (150267870).

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

128800998 is a wasteful number, since it uses less digits than its factorization.

128800998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7155619 (or 7155616 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 128800998 is about 11349.0527358013. The cubic root of 128800998 is about 505.0174787271.

The spelling of 128800998 in words is "one hundred twenty-eight million, eight hundred thousand, nine hundred ninety-eight".