129808404 has 36 divisors (see below), whose sum is σ = 357957600. Its totient is φ = 39335760.

The previous prime is 129808397. The next prime is 129808409. The reversal of 129808404 is 404808921.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (129808409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163504 + ... + 164295.

Almost surely, 2^129808404 is an apocalyptic number.

It is an amenable number.

129808404 is an abundant number, since it is smaller than the sum of its proper divisors (228149196).

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

129808404 is a wasteful number, since it uses less digits than its factorization.

129808404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327820 (or 327815 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 129808404 is about 11393.3491125305. The cubic root of 129808404 is about 506.3307112285.

The spelling of 129808404 in words is "one hundred twenty-nine million, eight hundred eight thousand, four hundred four".