129238308 has 48 divisors (see below), whose sum is σ = 337512000. Its totient is φ = 42764544.

The previous prime is 129238303. The next prime is 129238309. The reversal of 129238308 is 803832921.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (129238303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10708 + ... + 19316.

It is an arithmetic number, because the mean of its divisors is an integer number (7031500).

Almost surely, 2^129238308 is an apocalyptic number.

129238308 is a gapful number since it is divisible by the number (18) 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 129238308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168756000).

129238308 is an abundant number, since it is smaller than the sum of its proper divisors (208273692).

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

129238308 is a wasteful number, since it uses less digits than its factorization.

129238308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761 (or 8753 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 129238308 is about 11368.3027757005. The cubic root of 129238308 is about 505.5883845490.

The spelling of 129238308 in words is "one hundred twenty-nine million, two hundred thirty-eight thousand, three hundred eight".