128029994 has 16 divisors (see below), whose sum is σ = 194400000. Its totient is φ = 63233664.

The previous prime is 128029991. The next prime is 128030051. The reversal of 128029994 is 499920821.

It is not an unprimeable number, because it can be changed into a prime (128029991) 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, 101882 + ... + 103130.

It is an arithmetic number, because the mean of its divisors is an integer number (12150000).

Almost surely, 2^128029994 is an apocalyptic number.

128029994 is a deficient number, since it is larger than the sum of its proper divisors (66370006).

128029994 is a wasteful number, since it uses less digits than its factorization.

128029994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 128029994 is about 11315.0339813895. The cubic root of 128029994 is about 504.0077815419.

The spelling of 128029994 in words is "one hundred twenty-eight million, twenty-nine thousand, nine hundred ninety-four".