129040768 has 16 divisors (see below), whose sum is σ = 257073660. Its totient is φ = 64520320.

The previous prime is 129040757. The next prime is 129040777. The reversal of 129040768 is 867040921.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503938 + ... + 504193.

Almost surely, 2^129040768 is an apocalyptic number.

It is an amenable number.

129040768 is a deficient number, since it is larger than the sum of its proper divisors (128032892).

129040768 is an equidigital number, since it uses as much as digits as its factorization.

129040768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008145 (or 1008133 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 129040768 is about 11359.6112609543. The cubic root of 129040768 is about 505.3306568936.

The spelling of 129040768 in words is "one hundred twenty-nine million, forty thousand, seven hundred sixty-eight".