129097444 has 48 divisors (see below), whose sum is σ = 268934400. Its totient is φ = 53053056.

The previous prime is 129097433. The next prime is 129097471. The reversal of 129097444 is 444790921.

It is a junction number, because it is equal to n+sod(n) for n = 129097397 and 129097406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140017 + ... + 140935.

It is an arithmetic number, because the mean of its divisors is an integer number (5602800).

Almost surely, 2^129097444 is an apocalyptic number.

129097444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129097444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134467200).

129097444 is an abundant number, since it is smaller than the sum of its proper divisors (139836956).

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

129097444 is a wasteful number, since it uses less digits than its factorization.

129097444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 129097444 is about 11362.1056147177. The cubic root of 129097444 is about 505.4046281632.

The spelling of 129097444 in words is "one hundred twenty-nine million, ninety-seven thousand, four hundred forty-four".