129029744 has 20 divisors (see below), whose sum is σ = 250649880. Its totient is φ = 64345920.

The previous prime is 129029737. The next prime is 129029759. The reversal of 129029744 is 447920921.

It is a junction number, because it is equal to n+sod(n) for n = 129029698 and 129029707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4142 + ... + 16589.

It is an arithmetic number, because the mean of its divisors is an integer number (12532494).

Almost surely, 2^129029744 is an apocalyptic number.

It is an amenable number.

129029744 is a deficient number, since it is larger than the sum of its proper divisors (121620136).

129029744 is a wasteful number, since it uses less digits than its factorization.

129029744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21128 (or 21122 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 129029744 is about 11359.1260227185. The cubic root of 129029744 is about 505.3162662895.

The spelling of 129029744 in words is "one hundred twenty-nine million, twenty-nine thousand, seven hundred forty-four".