128289744 has 100 divisors (see below), whose sum is σ = 405108000. Its totient is φ = 38871360.

The previous prime is 128289709. The next prime is 128289761. The reversal of 128289744 is 447982821.

It is a self number, because there is not a number n which added to its sum of digits gives 128289744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9757 + ... + 18755.

It is an arithmetic number, because the mean of its divisors is an integer number (4051080).

Almost surely, 2^128289744 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 128289744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202554000).

128289744 is an abundant number, since it is smaller than the sum of its proper divisors (276818256).

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

128289744 is a wasteful number, since it uses less digits than its factorization.

128289744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030 (or 9015 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 128289744 is about 11326.5062574476. The cubic root of 128289744 is about 504.3483985639.

The spelling of 128289744 in words is "one hundred twenty-eight million, two hundred eighty-nine thousand, seven hundred forty-four".