128477568 has 64 divisors (see below), whose sum is σ = 361361520. Its totient is φ = 40304640.

The previous prime is 128477549. The next prime is 128477581. The reversal of 128477568 is 865774821.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3313 + ... + 16368.

Almost surely, 2^128477568 is an apocalyptic number.

It is an amenable number.

128477568 is an abundant number, since it is smaller than the sum of its proper divisors (232883952).

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

128477568 is a wasteful number, since it uses less digits than its factorization.

128477568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715 (or 19703 counting only the distinct ones).

The product of its digits is 752640, while the sum is 48.

The square root of 128477568 is about 11334.7945724658. The cubic root of 128477568 is about 504.5944108032.

The spelling of 128477568 in words is "one hundred twenty-eight million, four hundred seventy-seven thousand, five hundred sixty-eight".