128712064 has 32 divisors (see below), whose sum is σ = 276146640. Its totient is φ = 59404800.

The previous prime is 128712043. The next prime is 128712091. The reversal of 128712064 is 460217821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

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, 37012 + ... + 40339.

Almost surely, 2^128712064 is an apocalyptic number.

It is an amenable number.

128712064 is an abundant number, since it is smaller than the sum of its proper divisors (147434576).

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

128712064 is an equidigital number, since it uses as much as digits as its factorization.

128712064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77378 (or 77366 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 128712064 is about 11345.1339348639. The cubic root of 128712064 is about 504.9012178123.

Adding to 128712064 its reverse (460217821), we get a palindrome (588929885).

The spelling of 128712064 in words is "one hundred twenty-eight million, seven hundred twelve thousand, sixty-four".