129443338 has 16 divisors (see below), whose sum is σ = 206365320. Its totient is φ = 60683776.

The previous prime is 129443329. The next prime is 129443339. The reversal of 129443338 is 833344921.

It can be written as a sum of positive squares in 4 ways, for example, as 92025649 + 37417689 = 9593^2 + 6117^2 .

It is a junction number, because it is equal to n+sod(n) for n = 129443297 and 129443306.

It is not an unprimeable number, because it can be changed into a prime (129443339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2070 + ... + 16222.

Almost surely, 2^129443338 is an apocalyptic number.

129443338 is a deficient number, since it is larger than the sum of its proper divisors (76921982).

129443338 is a wasteful number, since it uses less digits than its factorization.

129443338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14441.

The product of its digits is 62208, while the sum is 37.

The square root of 129443338 is about 11377.3168190044. The cubic root of 129443338 is about 505.8556067032.

The spelling of 129443338 in words is "one hundred twenty-nine million, four hundred forty-three thousand, three hundred thirty-eight".