129235038 has 16 divisors (see below), whose sum is σ = 264481536. Its totient is φ = 42076440.

The previous prime is 129235033. The next prime is 129235069. The reversal of 129235038 is 830532921.

It is a super-2 number, since 2×129235038² = 33403390093722888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129235033) 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, 250198 + ... + 250713.

It is an arithmetic number, because the mean of its divisors is an integer number (16530096).

Almost surely, 2^129235038 is an apocalyptic number.

129235038 is an abundant number, since it is smaller than the sum of its proper divisors (135246498).

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

129235038 is a wasteful number, since it uses less digits than its factorization.

129235038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500959.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 129235038 is about 11368.1589538500. The cubic root of 129235038 is about 505.5841203645.

Adding to 129235038 its reverse (830532921), we get a palindrome (959767959).

The spelling of 129235038 in words is "one hundred twenty-nine million, two hundred thirty-five thousand, thirty-eight".