128448936 has 128 divisors (see below), whose sum is σ = 444902400. Its totient is φ = 33359040.

The previous prime is 128448913. The next prime is 128449007. The reversal of 128448936 is 639844821.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 128448891 and 128448900.

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 31 ways as a sum of consecutive naturals, for example, 12771 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (3475800).

Almost surely, 2^128448936 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 128448936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222451200).

128448936 is an abundant number, since it is smaller than the sum of its proper divisors (316453464).

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

128448936 is a wasteful number, since it uses less digits than its factorization.

128448936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7756 (or 7746 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 128448936 is about 11333.5314884638. The cubic root of 128448936 is about 504.5569240503.

The spelling of 128448936 in words is "one hundred twenty-eight million, four hundred forty-eight thousand, nine hundred thirty-six".