129494328 has 64 divisors (see below), whose sum is σ = 333590400. Its totient is φ = 41865600.

The previous prime is 129494327. The next prime is 129494341. The reversal of 129494328 is 823494921.

It is a self number, because there is not a number n which added to its sum of digits gives 129494328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129494327) 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, 184378 + ... + 185078.

It is an arithmetic number, because the mean of its divisors is an integer number (5212350).

Almost surely, 2^129494328 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 129494328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166795200).

129494328 is an abundant number, since it is smaller than the sum of its proper divisors (204096072).

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

129494328 is a wasteful number, since it uses less digits than its factorization.

129494328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 928 counting only the distinct ones).

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

The square root of 129494328 is about 11379.5574606397. The cubic root of 129494328 is about 505.9220197806.

The spelling of 129494328 in words is "one hundred twenty-nine million, four hundred ninety-four thousand, three hundred twenty-eight".