129472238 has 16 divisors (see below), whose sum is σ = 235008864. Its totient is φ = 52224000.

The previous prime is 129472237. The next prime is 129472279. The reversal of 129472238 is 832274921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129472237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271763 + ... + 272238.

It is an arithmetic number, because the mean of its divisors is an integer number (14688054).

Almost surely, 2^129472238 is an apocalyptic number.

129472238 is a deficient number, since it is larger than the sum of its proper divisors (105536626).

129472238 is a wasteful number, since it uses less digits than its factorization.

129472238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544027.

The product of its digits is 48384, while the sum is 38.

The square root of 129472238 is about 11378.5868191090. The cubic root of 129472238 is about 505.8932503018.

The spelling of 129472238 in words is "one hundred twenty-nine million, four hundred seventy-two thousand, two hundred thirty-eight".