129944328 has 64 divisors (see below), whose sum is σ = 345461760. Its totient is φ = 40590336.

The previous prime is 129944327. The next prime is 129944329. The reversal of 129944328 is 823449921.

It is an interprime number because it is at equal distance from previous prime (129944327) and next prime (129944329).

It is a self number, because there is not a number n which added to its sum of digits gives 129944328.

It is not an unprimeable number, because it can be changed into a prime (129944327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119001 + ... + 120087.

It is an arithmetic number, because the mean of its divisors is an integer number (5397840).

Almost surely, 2^129944328 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 129944328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172730880).

129944328 is an abundant number, since it is smaller than the sum of its proper divisors (215517432).

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

129944328 is a wasteful number, since it uses less digits than its factorization.

129944328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406 (or 1402 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 129944328 is about 11399.3126108551. The cubic root of 129944328 is about 506.5073779820.

The spelling of 129944328 in words is "one hundred twenty-nine million, nine hundred forty-four thousand, three hundred twenty-eight".