129143968 has 48 divisors (see below), whose sum is σ = 274990464. Its totient is φ = 59468800.

The previous prime is 129143897. The next prime is 129144013. The reversal of 129143968 is 869341921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23043 + ... + 28093.

It is an arithmetic number, because the mean of its divisors is an integer number (5728968).

Almost surely, 2^129143968 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 129143968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137495232).

129143968 is an abundant number, since it is smaller than the sum of its proper divisors (145846496).

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

129143968 is a wasteful number, since it uses less digits than its factorization.

129143968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5117 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 129143968 is about 11364.1527620848. The cubic root of 129143968 is about 505.4653332662.

The spelling of 129143968 in words is "one hundred twenty-nine million, one hundred forty-three thousand, nine hundred sixty-eight".