129230976 has 128 divisors (see below), whose sum is σ = 396380160. Its totient is φ = 36541440.

The previous prime is 129230963. The next prime is 129230977. The reversal of 129230976 is 679032921.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129230977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351945 + ... + 352311.

It is an arithmetic number, because the mean of its divisors is an integer number (3096720).

Almost surely, 2^129230976 is an apocalyptic number.

129230976 is a gapful number since it is divisible by the number (16) 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 129230976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198190080).

129230976 is an abundant number, since it is smaller than the sum of its proper divisors (267149184).

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

129230976 is a wasteful number, since it uses less digits than its factorization.

129230976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 129230976 is about 11367.9802955494. The cubic root of 129230976 is about 505.5788232865.

The spelling of 129230976 in words is "one hundred twenty-nine million, two hundred thirty thousand, nine hundred seventy-six".