128943930 has 16 divisors (see below), whose sum is σ = 309465504. Its totient is φ = 34385040.

The previous prime is 128943923. The next prime is 128943931. The reversal of 128943930 is 39349821.

It is not an unprimeable number, because it can be changed into a prime (128943931) 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 7 ways as a sum of consecutive naturals, for example, 2149036 + ... + 2149095.

It is an arithmetic number, because the mean of its divisors is an integer number (19341594).

Almost surely, 2^128943930 is an apocalyptic number.

128943930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128943930 is an abundant number, since it is smaller than the sum of its proper divisors (180521574).

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

128943930 is a wasteful number, since it uses less digits than its factorization.

128943930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298141.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 128943930 is about 11355.3480792092. The cubic root of 128943930 is about 505.2042176370.

The spelling of 128943930 in words is "one hundred twenty-eight million, nine hundred forty-three thousand, nine hundred thirty".