129004836 has 12 divisors (see below), whose sum is σ = 301011312. Its totient is φ = 43001608.

The previous prime is 129004783. The next prime is 129004853. The reversal of 129004836 is 638400921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×129004836² = 33284495422773792, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129004797 and 129004806.

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, 5375190 + ... + 5375213.

It is an arithmetic number, because the mean of its divisors is an integer number (25084276).

Almost surely, 2^129004836 is an apocalyptic number.

It is an amenable number.

129004836 is an abundant number, since it is smaller than the sum of its proper divisors (172006476).

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

129004836 is a wasteful number, since it uses less digits than its factorization.

129004836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750410 (or 10750408 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 129004836 is about 11358.0295826345. The cubic root of 129004836 is about 505.2837486515.

The spelling of 129004836 in words is "one hundred twenty-nine million, four thousand, eight hundred thirty-six".