129027448 has 64 divisors (see below), whose sum is σ = 271537920. Its totient is φ = 56985600.

The previous prime is 129027419. The next prime is 129027463. The reversal of 129027448 is 844720921.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668440 + ... + 668632.

It is an arithmetic number, because the mean of its divisors is an integer number (4242780).

Almost surely, 2^129027448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129027448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135768960).

129027448 is an abundant number, since it is smaller than the sum of its proper divisors (142510472).

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

129027448 is a wasteful number, since it uses less digits than its factorization.

129027448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 129027448 is about 11359.0249581555. The cubic root of 129027448 is about 505.3132690141.

The spelling of 129027448 in words is "one hundred twenty-nine million, twenty-seven thousand, four hundred forty-eight".