128216064 has 44 divisors (see below), whose sum is σ = 341750744. Its totient is φ = 42737664.

The previous prime is 128216059. The next prime is 128216113. The reversal of 128216064 is 460612821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17797 + ... + 23940.

Almost surely, 2^128216064 is an apocalyptic number.

It is an amenable number.

128216064 is an abundant number, since it is smaller than the sum of its proper divisors (213534680).

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

128216064 is an equidigital number, since it uses as much as digits as its factorization.

128216064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41760 (or 41742 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 128216064 is about 11323.2532427744. The cubic root of 128216064 is about 504.2518267851.

Adding to 128216064 its reverse (460612821), we get a palindrome (588828885).

The spelling of 128216064 in words is "one hundred twenty-eight million, two hundred sixteen thousand, sixty-four".