129955448 has 24 divisors (see below), whose sum is σ = 283449600. Its totient is φ = 55695024.

The previous prime is 129955447. The next prime is 129955471. The reversal of 129955448 is 844559921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129955447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165368 + ... + 166151.

It is an arithmetic number, because the mean of its divisors is an integer number (11810400).

Almost surely, 2^129955448 is an apocalyptic number.

It is an amenable number.

129955448 is an abundant number, since it is smaller than the sum of its proper divisors (153494152).

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

129955448 is a wasteful number, since it uses less digits than its factorization.

129955448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331539 (or 331528 counting only the distinct ones).

The product of its digits is 518400, while the sum is 47.

The square root of 129955448 is about 11399.8003491289. The cubic root of 129955448 is about 506.5218257112.

The spelling of 129955448 in words is "one hundred twenty-nine million, nine hundred fifty-five thousand, four hundred forty-eight".