It is a sphenic number, since it is the product of 3 distinct primes.
It is an unprimeable number.
Almost surely, 2128436890 is an apocalyptic number.
128436890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
128436890 is a wasteful number, since it uses less digits than its factorization.
128436890 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 12843696.
The square root of 128436890 is about 11333.0000441189. Note that the first 4 decimals coincide. The cubic root of 128436890 is about 504.5411510308.
The spelling of 128436890 in words is "one hundred twenty-eight million, four hundred thirty-six thousand, eight hundred ninety".