128384646 has 32 divisors (see below), whose sum is σ = 292789728. Its totient is φ = 37178880.

The previous prime is 128384623. The next prime is 128384647. The reversal of 128384646 is 646483821.

It is a junction number, because it is equal to n+sod(n) for n = 128384598 and 128384607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128384647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47085 + ... + 49736.

It is an arithmetic number, because the mean of its divisors is an integer number (9149679).

Almost surely, 2^128384646 is an apocalyptic number.

128384646 is an abundant number, since it is smaller than the sum of its proper divisors (164405082).

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

128384646 is a wasteful number, since it uses less digits than its factorization.

128384646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96856.

The product of its digits is 221184, while the sum is 42.

The square root of 128384646 is about 11330.6948595397. The cubic root of 128384646 is about 504.4727313768.

The spelling of 128384646 in words is "one hundred twenty-eight million, three hundred eighty-four thousand, six hundred forty-six".