129500238 has 96 divisors (see below), whose sum is σ = 321753600. Its totient is φ = 34546176.

The previous prime is 129500233. The next prime is 129500243. The reversal of 129500238 is 832005921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129500233) and next prime (129500243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129500233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541723 + ... + 541961.

It is an arithmetic number, because the mean of its divisors is an integer number (3351600).

Almost surely, 2^129500238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129500238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160876800).

129500238 is an abundant number, since it is smaller than the sum of its proper divisors (192253362).

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

129500238 is a wasteful number, since it uses less digits than its factorization.

129500238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 129500238 is about 11379.8171338559. The cubic root of 129500238 is about 505.9297162661.

The spelling of 129500238 in words is "one hundred twenty-nine million, five hundred thousand, two hundred thirty-eight".