129380112 has 80 divisors (see below), whose sum is σ = 383388160. Its totient is φ = 41731200.

The previous prime is 129380093. The next prime is 129380137. The reversal of 129380112 is 211083921.

It is a super-2 number, since 2×129380112² = 33478426762265088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 8562 + ... + 18222.

It is an arithmetic number, because the mean of its divisors is an integer number (4792352).

Almost surely, 2^129380112 is an apocalyptic number.

129380112 is a gapful number since it is divisible by the number (12) 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 129380112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191694080).

129380112 is an abundant number, since it is smaller than the sum of its proper divisors (254008048).

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

129380112 is a wasteful number, since it uses less digits than its factorization.

129380112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709 (or 9697 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 129380112 is about 11374.5378807229. The cubic root of 129380112 is about 505.7732323458.

The spelling of 129380112 in words is "one hundred twenty-nine million, three hundred eighty thousand, one hundred twelve".