129028238 has 8 divisors (see below), whose sum is σ = 193845288. Its totient is φ = 64413144.

The previous prime is 129028199. The next prime is 129028247. The reversal of 129028238 is 832820921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 129028198 and 129028207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48881 + ... + 51452.

It is an arithmetic number, because the mean of its divisors is an integer number (24230661).

Almost surely, 2^129028238 is an apocalyptic number.

129028238 is a deficient number, since it is larger than the sum of its proper divisors (64817050).

129028238 is a wasteful number, since it uses less digits than its factorization.

129028238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100978.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 129028238 is about 11359.0597322138. The cubic root of 129028238 is about 505.3143003106.

The spelling of 129028238 in words is "one hundred twenty-nine million, twenty-eight thousand, two hundred thirty-eight".