128694080 has 112 divisors (see below), whose sum is σ = 332969616. Its totient is φ = 47185920.

The previous prime is 128694061. The next prime is 128694127. The reversal of 128694080 is 80496821.

It can be written as a sum of positive squares in 8 ways, for example, as 2715904 + 125978176 = 1648^2 + 11224^2 .

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, 222752 + ... + 223328.

It is an arithmetic number, because the mean of its divisors is an integer number (2972943).

Almost surely, 2^128694080 is an apocalyptic number.

128694080 is a gapful number since it is divisible by the number (10) 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 128694080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166484808).

128694080 is an abundant number, since it is smaller than the sum of its proper divisors (204275536).

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

128694080 is a wasteful number, since it uses less digits than its factorization.

128694080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 128694080 is about 11344.3413206761. The cubic root of 128694080 is about 504.8777013260.

The spelling of 128694080 in words is "one hundred twenty-eight million, six hundred ninety-four thousand, eighty".