128020604334 has 128 divisors (see below), whose sum is σ = 305235492864. Its totient is φ = 35026992000.

The previous prime is 128020604293. The next prime is 128020604339. The reversal of 128020604334 is 433406020821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128020604295 and 128020604304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128020604339) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55395039 + ... + 55397349.

It is an arithmetic number, because the mean of its divisors is an integer number (2384652288).

Almost surely, 2^128020604334 is an apocalyptic number.

128020604334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128020604334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152617746432).

128020604334 is an abundant number, since it is smaller than the sum of its proper divisors (177214888530).

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

128020604334 is a wasteful number, since it uses less digits than its factorization.

128020604334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 128020604334 in words is "one hundred twenty-eight billion, twenty million, six hundred four thousand, three hundred thirty-four".