129389112 has 96 divisors (see below), whose sum is σ = 366191280. Its totient is φ = 41233920.

The previous prime is 129389089. The next prime is 129389119. The reversal of 129389112 is 211983921.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129389119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156043 + ... + 156869.

Almost surely, 2^129389112 is an apocalyptic number.

129389112 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 129389112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183095640).

129389112 is an abundant number, since it is smaller than the sum of its proper divisors (236802168).

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

129389112 is a wasteful number, since it uses less digits than its factorization.

129389112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 926 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 129389112 is about 11374.9334943111. The cubic root of 129389112 is about 505.7849596855.

The spelling of 129389112 in words is "one hundred twenty-nine million, three hundred eighty-nine thousand, one hundred twelve".