129208448 has 32 divisors (see below), whose sum is σ = 257986560. Its totient is φ = 64459008.

The previous prime is 129208439. The next prime is 129208451. The reversal of 129208448 is 844802921.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76865 + ... + 78527.

It is an arithmetic number, because the mean of its divisors is an integer number (8062080).

Almost surely, 2^129208448 is an apocalyptic number.

It is an amenable number.

129208448 is a deficient number, since it is larger than the sum of its proper divisors (128778112).

129208448 is an equidigital number, since it uses as much as digits as its factorization.

129208448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2272 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 129208448 is about 11366.9893991329. The cubic root of 129208448 is about 505.5494434841.

The spelling of 129208448 in words is "one hundred twenty-nine million, two hundred eight thousand, four hundred forty-eight".