129398976 has 168 divisors, whose sum is σ = 431109120. Its totient is φ = 36343296.

The previous prime is 129398963. The next prime is 129399001. The reversal of 129398976 is 679893921.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269905 + ... + 270383.

Almost surely, 2^129398976 is an apocalyptic number.

129398976 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 129398976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215554560).

129398976 is an abundant number, since it is smaller than the sum of its proper divisors (301710144).

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

129398976 is a wasteful number, since it uses less digits than its factorization.

129398976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 558 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 129398976 is about 11375.3670710004. The cubic root of 129398976 is about 505.7978122251.

The spelling of 129398976 in words is "one hundred twenty-nine million, three hundred ninety-eight thousand, nine hundred seventy-six".