129896448 has 156 divisors (see below), whose sum is σ = 390415824. Its totient is φ = 38092800.

The previous prime is 129896447. The next prime is 129896449. The reversal of 129896448 is 844698921.

It is an interprime number because it is at equal distance from previous prime (129896447) and next prime (129896449).

It is a self number, because there is not a number n which added to its sum of digits gives 129896448.

It is not an unprimeable number, because it can be changed into a prime (129896443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4190193 + ... + 4190223.

Almost surely, 2^129896448 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 129896448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195207912).

129896448 is an abundant number, since it is smaller than the sum of its proper divisors (260519376).

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

129896448 is an equidigital number, since it uses as much as digits as its factorization.

129896448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 47 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 129896448 is about 11397.2122907314. The cubic root of 129896448 is about 506.4451601772.

The spelling of 129896448 in words is "one hundred twenty-nine million, eight hundred ninety-six thousand, four hundred forty-eight".