129381238 has 32 divisors (see below), whose sum is σ = 234812160. Its totient is φ = 52284960.

The previous prime is 129381211. The next prime is 129381269. The reversal of 129381238 is 832183921.

It is a super-3 number, since 3×129381238³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129381197 and 129381206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13753 + ... + 21163.

It is an arithmetic number, because the mean of its divisors is an integer number (7337880).

Almost surely, 2^129381238 is an apocalyptic number.

129381238 is a deficient number, since it is larger than the sum of its proper divisors (105430922).

129381238 is a wasteful number, since it uses less digits than its factorization.

129381238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7492.

The product of its digits is 20736, while the sum is 37.

The square root of 129381238 is about 11374.5873771315. The cubic root of 129381238 is about 505.7746995961.

The spelling of 129381238 in words is "one hundred twenty-nine million, three hundred eighty-one thousand, two hundred thirty-eight".