128868084 has 120 divisors (see below), whose sum is σ = 352182600. Its totient is φ = 41057280.

The previous prime is 128868071. The next prime is 128868101. The reversal of 128868084 is 480868821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 272484 + 128595600 = 522^2 + 11340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1182222 + ... + 1182330.

It is an arithmetic number, because the mean of its divisors is an integer number (2934855).

Almost surely, 2^128868084 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 128868084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176091300).

128868084 is an abundant number, since it is smaller than the sum of its proper divisors (223314516).

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

128868084 is a wasteful number, since it uses less digits than its factorization.

128868084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The square root of 128868084 is about 11352.0079281156. The cubic root of 128868084 is about 505.1051429604.

The spelling of 128868084 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, eighty-four".