129683838 has 8 divisors (see below), whose sum is σ = 259367688. Its totient is φ = 43227944.

The previous prime is 129683809. The next prime is 129683903. The reversal of 129683838 is 838386921.

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

129683838 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10806981 + ... + 10806992.

It is an arithmetic number, because the mean of its divisors is an integer number (32420961).

Almost surely, 2^129683838 is an apocalyptic number.

129683838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129683838 is a wasteful number, since it uses less digits than its factorization.

129683838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21613978.

The product of its digits is 497664, while the sum is 48.

The square root of 129683838 is about 11387.8811901073. The cubic root of 129683838 is about 506.1686986649.

The spelling of 129683838 in words is "one hundred twenty-nine million, six hundred eighty-three thousand, eight hundred thirty-eight".