129635438 has 8 divisors (see below), whose sum is σ = 205891632. Its totient is φ = 61004896.

The previous prime is 129635393. The next prime is 129635477. The reversal of 129635438 is 834536921.

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 = 129635395 and 129635404.

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, 1906370 + ... + 1906437.

It is an arithmetic number, because the mean of its divisors is an integer number (25736454).

Almost surely, 2^129635438 is an apocalyptic number.

129635438 is a deficient number, since it is larger than the sum of its proper divisors (76256194).

129635438 is a wasteful number, since it uses less digits than its factorization.

129635438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812826.

The product of its digits is 155520, while the sum is 41.

The square root of 129635438 is about 11385.7559257170. The cubic root of 129635438 is about 506.1057208521.

The spelling of 129635438 in words is "one hundred twenty-nine million, six hundred thirty-five thousand, four hundred thirty-eight".