128455784 has 16 divisors (see below), whose sum is σ = 241189920. Its totient is φ = 64138480.

The previous prime is 128455783. The next prime is 128455793. The reversal of 128455784 is 487554821.

It is not an unprimeable number, because it can be changed into a prime (128455783) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4862 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (15074370).

Almost surely, 2^128455784 is an apocalyptic number.

It is an amenable number.

128455784 is a deficient number, since it is larger than the sum of its proper divisors (112734136).

128455784 is a wasteful number, since it uses less digits than its factorization.

128455784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22360 (or 22356 counting only the distinct ones).

The product of its digits is 358400, while the sum is 44.

The square root of 128455784 is about 11333.8335968021. The cubic root of 128455784 is about 504.5658903745.

The spelling of 128455784 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, seven hundred eighty-four".