129147368 has 64 divisors (see below), whose sum is σ = 294658560. Its totient is φ = 51803136.

The previous prime is 129147331. The next prime is 129147371. The reversal of 129147368 is 863741921.

It is a super-2 number, since 2×129147368² = 33358085322654848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278705 + ... + 279167.

It is an arithmetic number, because the mean of its divisors is an integer number (4604040).

Almost surely, 2^129147368 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 129147368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147329280).

129147368 is an abundant number, since it is smaller than the sum of its proper divisors (165511192).

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

129147368 is a wasteful number, since it uses less digits than its factorization.

129147368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 782 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 129147368 is about 11364.3023543023. The cubic root of 129147368 is about 505.4697690575.

The spelling of 129147368 in words is "one hundred twenty-nine million, one hundred forty-seven thousand, three hundred sixty-eight".