129028904 has 16 divisors (see below), whose sum is σ = 243198720. Its totient is φ = 64175920.

The previous prime is 129028877. The next prime is 129028909. The reversal of 129028904 is 409820921.

It is not an unprimeable number, because it can be changed into a prime (129028909) 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 3 ways as a sum of consecutive naturals, for example, 40694 + ... + 43749.

It is an arithmetic number, because the mean of its divisors is an integer number (15199920).

Almost surely, 2^129028904 is an apocalyptic number.

It is an amenable number.

129028904 is a deficient number, since it is larger than the sum of its proper divisors (114169816).

129028904 is a wasteful number, since it uses less digits than its factorization.

129028904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84640 (or 84636 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 129028904 is about 11359.0890479827. The cubic root of 129028904 is about 505.3151697295.

The spelling of 129028904 in words is "one hundred twenty-nine million, twenty-eight thousand, nine hundred four".