128385678 has 32 divisors (see below), whose sum is σ = 274482432. Its totient is φ = 39934400.

The previous prime is 128385667. The next prime is 128385707. The reversal of 128385678 is 876583821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5688 + ... + 17003.

It is an arithmetic number, because the mean of its divisors is an integer number (8577576).

Almost surely, 2^128385678 is an apocalyptic number.

128385678 is an abundant number, since it is smaller than the sum of its proper divisors (146096754).

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

128385678 is a wasteful number, since it uses less digits than its factorization.

128385678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22760.

The product of its digits is 645120, while the sum is 48.

The square root of 128385678 is about 11330.7403994620. The cubic root of 128385678 is about 504.4740830817.

The spelling of 128385678 in words is "one hundred twenty-eight million, three hundred eighty-five thousand, six hundred seventy-eight".