129136284 has 36 divisors (see below), whose sum is σ = 345631104. Its totient is φ = 40513152.

The previous prime is 129136279. The next prime is 129136303. The reversal of 129136284 is 482631921.

129136284 is a `hidden beast` number, since 1 + 29 + 1 + 3 + 628 + 4 = 666.

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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104892 + ... + 106115.

It is an arithmetic number, because the mean of its divisors is an integer number (9600864).

Almost surely, 2^129136284 is an apocalyptic number.

It is an amenable number.

129136284 is an abundant number, since it is smaller than the sum of its proper divisors (216494820).

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

129136284 is a wasteful number, since it uses less digits than its factorization.

129136284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211034 (or 211029 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 129136284 is about 11363.8146764192. The cubic root of 129136284 is about 505.4553080912.

The spelling of 129136284 in words is "one hundred twenty-nine million, one hundred thirty-six thousand, two hundred eighty-four".