128689468 has 6 divisors (see below), whose sum is σ = 225206576. Its totient is φ = 64344732.

The previous prime is 128689403. The next prime is 128689471. The reversal of 128689468 is 864986821.

It is a super-3 number, since 3×128689468³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16086180 + ... + 16086187.

Almost surely, 2^128689468 is an apocalyptic number.

It is an amenable number.

128689468 is a deficient number, since it is larger than the sum of its proper divisors (96517108).

128689468 is a wasteful number, since it uses less digits than its factorization.

128689468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32172371 (or 32172369 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 52.

The square root of 128689468 is about 11344.1380457045. The cubic root of 128689468 is about 504.8716701660.

The spelling of 128689468 in words is "one hundred twenty-eight million, six hundred eighty-nine thousand, four hundred sixty-eight".