129003864 has 32 divisors (see below), whose sum is σ = 351829440. Its totient is φ = 39092000.

The previous prime is 129003857. The next prime is 129003869. The reversal of 129003864 is 468300921.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129003869) 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, 244062 + ... + 244589.

It is an arithmetic number, because the mean of its divisors is an integer number (10994670).

Almost surely, 2^129003864 is an apocalyptic number.

It is an amenable number.

129003864 is an abundant number, since it is smaller than the sum of its proper divisors (222825576).

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

129003864 is a wasteful number, since it uses less digits than its factorization.

129003864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488671 (or 488667 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 129003864 is about 11357.9867934419. The cubic root of 129003864 is about 505.2824796111.

The spelling of 129003864 in words is "one hundred twenty-nine million, three thousand, eight hundred sixty-four".