128445648 has 80 divisors (see below), whose sum is σ = 351929856. Its totient is φ = 40296960.

The previous prime is 128445623. The next prime is 128445671. The reversal of 128445648 is 846544821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53890 + ... + 56222.

Almost surely, 2^128445648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128445648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175964928).

128445648 is an abundant number, since it is smaller than the sum of its proper divisors (223484208).

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

128445648 is a wasteful number, since it uses less digits than its factorization.

128445648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2406 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 128445648 is about 11333.3864312482. The cubic root of 128445648 is about 504.5526188445.

The spelling of 128445648 in words is "one hundred twenty-eight million, four hundred forty-five thousand, six hundred forty-eight".