128333856 has 96 divisors (see below), whose sum is σ = 386805888. Its totient is φ = 36495360.

The previous prime is 128333827. The next prime is 128333869. The reversal of 128333856 is 658333821.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236946 + ... + 237486.

It is an arithmetic number, because the mean of its divisors is an integer number (4029228).

Almost surely, 2^128333856 is an apocalyptic number.

128333856 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 128333856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193402944).

128333856 is an abundant number, since it is smaller than the sum of its proper divisors (258472032).

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

128333856 is a wasteful number, since it uses less digits than its factorization.

128333856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 906 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 128333856 is about 11328.4533807577. The cubic root of 128333856 is about 504.4061981104.

The spelling of 128333856 in words is "one hundred twenty-eight million, three hundred thirty-three thousand, eight hundred fifty-six".