129133408 has 24 divisors (see below), whose sum is σ = 265286448. Its totient is φ = 61759104.

The previous prime is 129133379. The next prime is 129133409. The reversal of 129133408 is 804331921.

It is a self number, because there is not a number n which added to its sum of digits gives 129133408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129133409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86991 + ... + 88462.

It is an arithmetic number, because the mean of its divisors is an integer number (11053602).

Almost surely, 2^129133408 is an apocalyptic number.

It is an amenable number.

129133408 is an abundant number, since it is smaller than the sum of its proper divisors (136153040).

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

129133408 is a wasteful number, since it uses less digits than its factorization.

129133408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175486 (or 175478 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 129133408 is about 11363.6881337003. The cubic root of 129133408 is about 505.4515557240.

The spelling of 129133408 in words is "one hundred twenty-nine million, one hundred thirty-three thousand, four hundred eight".