128642080 has 48 divisors (see below), whose sum is σ = 347336640. Its totient is φ = 44105472.

The previous prime is 128642071. The next prime is 128642083. The reversal of 128642080 is 80246821.

It is not an unprimeable number, because it can be changed into a prime (128642083) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56310 + ... + 58549.

It is an arithmetic number, because the mean of its divisors is an integer number (7236180).

Almost surely, 2^128642080 is an apocalyptic number.

128642080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128642080 is an abundant number, since it is smaller than the sum of its proper divisors (218694560).

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

128642080 is a wasteful number, since it uses less digits than its factorization.

128642080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114881 (or 114873 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 128642080 is about 11342.0491975657. The cubic root of 128642080 is about 504.8096920406.

The spelling of 128642080 in words is "one hundred twenty-eight million, six hundred forty-two thousand, eighty".