129568284 has 72 divisors (see below), whose sum is σ = 339393600. Its totient is φ = 41651712.

The previous prime is 129568267. The next prime is 129568291. The reversal of 129568284 is 482865921.

129568284 is a `hidden beast` number, since 1 + 2 + 9 + 568 + 2 + 84 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122992 + ... + 124040.

It is an arithmetic number, because the mean of its divisors is an integer number (4713800).

Almost surely, 2^129568284 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129568284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169696800).

129568284 is an abundant number, since it is smaller than the sum of its proper divisors (209825316).

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

129568284 is a wasteful number, since it uses less digits than its factorization.

129568284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1174 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 129568284 is about 11382.8065080629. The cubic root of 129568284 is about 506.0183144699.

The spelling of 129568284 in words is "one hundred twenty-nine million, five hundred sixty-eight thousand, two hundred eighty-four".