128785914 has 72 divisors (see below), whose sum is σ = 312255840. Its totient is φ = 38247552.

The previous prime is 128785913. The next prime is 128785957. The reversal of 128785914 is 419587821.

Its product of digits (161280) is a multiple of the sum of its prime divisors (1344).

It is a self number, because there is not a number n which added to its sum of digits gives 128785914.

It is not an unprimeable number, because it can be changed into a prime (128785913) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 98187 + ... + 99489.

Almost surely, 2^128785914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128785914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156127920).

128785914 is an abundant number, since it is smaller than the sum of its proper divisors (183469926).

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

128785914 is a wasteful number, since it uses less digits than its factorization.

128785914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 1344 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 128785914 is about 11348.3881674888. The cubic root of 128785914 is about 504.9977636080.

The spelling of 128785914 in words is "one hundred twenty-eight million, seven hundred eighty-five thousand, nine hundred fourteen".