129284887936 has 128 divisors (see below), whose sum is σ = 291218976000. Its totient is φ = 56846254080.

The previous prime is 129284887903. The next prime is 129284887937. The reversal of 129284887936 is 639788482921.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129284887937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1923180 + ... + 1989268.

It is an arithmetic number, because the mean of its divisors is an integer number (2275148250).

Almost surely, 2^129284887936 is an apocalyptic number.

129284887936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129284887936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145609488000).

129284887936 is an abundant number, since it is smaller than the sum of its proper divisors (161934088064).

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

129284887936 is a wasteful number, since it uses less digits than its factorization.

129284887936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66180 (or 66168 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 67.

The spelling of 129284887936 in words is "one hundred twenty-nine billion, two hundred eighty-four million, eight hundred eighty-seven thousand, nine hundred thirty-six".