128398338 has 16 divisors (see below), whose sum is σ = 285329760. Its totient is φ = 42799428.

The previous prime is 128398327. The next prime is 128398339. The reversal of 128398338 is 833893821.

It is a super-2 number, since 2×128398338² = 32972266402324488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128398293 and 128398302.

It is not an unprimeable number, because it can be changed into a prime (128398339) 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, 1188820 + ... + 1188927.

It is an arithmetic number, because the mean of its divisors is an integer number (17833110).

Almost surely, 2^128398338 is an apocalyptic number.

128398338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128398338 is an abundant number, since it is smaller than the sum of its proper divisors (156931422).

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

128398338 is a wasteful number, since it uses less digits than its factorization.

128398338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377758 (or 2377752 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 128398338 is about 11331.2990429165. The cubic root of 128398338 is about 504.4906644535.

The spelling of 128398338 in words is "one hundred twenty-eight million, three hundred ninety-eight thousand, three hundred thirty-eight".