128868064 has 24 divisors (see below), whose sum is σ = 273225960. Its totient is φ = 59477376.

The previous prime is 128868049. The next prime is 128868071. The reversal of 128868064 is 460868821.

It is a self number, because there is not a number n which added to its sum of digits gives 128868064.

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, 154474 + ... + 155305.

It is an arithmetic number, because the mean of its divisors is an integer number (11384415).

Almost surely, 2^128868064 is an apocalyptic number.

It is an amenable number.

128868064 is an abundant number, since it is smaller than the sum of its proper divisors (144357896).

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

128868064 is a wasteful number, since it uses less digits than its factorization.

128868064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309802 (or 309794 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 128868064 is about 11352.0070472142. The cubic root of 128868064 is about 505.1051168301.

The spelling of 128868064 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, sixty-four".