129047436 has 36 divisors (see below), whose sum is σ = 372804432. Its totient is φ = 36870624.

The previous prime is 129047417. The next prime is 129047441. The reversal of 129047436 is 634740921.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 129047436.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255795 + ... + 256298.

Almost surely, 2^129047436 is an apocalyptic number.

It is an amenable number.

129047436 is an abundant number, since it is smaller than the sum of its proper divisors (243756996).

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

129047436 is a wasteful number, since it uses less digits than its factorization.

129047436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512110 (or 512105 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 129047436 is about 11359.9047531218. The cubic root of 129047436 is about 505.3393608271.

The spelling of 129047436 in words is "one hundred twenty-nine million, forty-seven thousand, four hundred thirty-six".