128089680 has 80 divisors (see below), whose sum is σ = 402724224. Its totient is φ = 33671680.

The previous prime is 128089673. The next prime is 128089693. The reversal of 128089680 is 86980821.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×128089680² = 32813932245004800, which contains 22 as substring.

It is a zygodrome in base 11.

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, 13282 + ... + 20798.

Almost surely, 2^128089680 is an apocalyptic number.

128089680 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 128089680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201362112).

128089680 is an abundant number, since it is smaller than the sum of its proper divisors (274634544).

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

128089680 is a wasteful number, since it uses less digits than its factorization.

128089680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604 (or 7598 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 128089680 is about 11317.6711385338. The cubic root of 128089680 is about 504.0860901061.

The spelling of 128089680 in words is "one hundred twenty-eight million, eighty-nine thousand, six hundred eighty".