128407398 has 16 divisors (see below), whose sum is σ = 293502720. Its totient is φ = 36687816.

The previous prime is 128407387. The next prime is 128407421. The reversal of 128407398 is 893704821.

It is a super-2 number, since 2×128407398² = 32976919722260808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 3057319 = 128407398 / (1 + 2 + 8 + 4 + 0 + 7 + 3 + 9 + 8).

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, 1528618 + ... + 1528701.

It is an arithmetic number, because the mean of its divisors is an integer number (18343920).

Almost surely, 2^128407398 is an apocalyptic number.

128407398 is an abundant number, since it is smaller than the sum of its proper divisors (165095322).

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

128407398 is a wasteful number, since it uses less digits than its factorization.

128407398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057331.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 128407398 is about 11331.6988135054. The cubic root of 128407398 is about 504.5025300741.

The spelling of 128407398 in words is "one hundred twenty-eight million, four hundred seven thousand, three hundred ninety-eight".