128272896 has 120 divisors (see below), whose sum is σ = 384287904. Its totient is φ = 42716160.

The previous prime is 128272891. The next prime is 128272943. The reversal of 128272896 is 698272821.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (128272891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123901 + ... + 124931.

Almost surely, 2^128272896 is an apocalyptic number.

128272896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128272896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192143952).

128272896 is an abundant number, since it is smaller than the sum of its proper divisors (256015008).

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

128272896 is an frugal number, since it uses more digits than its factorization.

128272896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1036 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 128272896 is about 11325.7624908878. The cubic root of 128272896 is about 504.3263192883.

The spelling of 128272896 in words is "one hundred twenty-eight million, two hundred seventy-two thousand, eight hundred ninety-six".