129122448 has 240 divisors, whose sum is σ = 432222336. Its totient is φ = 32901120.

The previous prime is 129122431. The next prime is 129122449. The reversal of 129122448 is 844221921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129122449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1253565 + ... + 1253667.

Almost surely, 2^129122448 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 129122448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216111168).

129122448 is an abundant number, since it is smaller than the sum of its proper divisors (303099888).

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

129122448 is a wasteful number, since it uses less digits than its factorization.

129122448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182 (or 169 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 129122448 is about 11363.2058856645. The cubic root of 129122448 is about 505.4372555108.

The spelling of 129122448 in words is "one hundred twenty-nine million, one hundred twenty-two thousand, four hundred forty-eight".