129085704 has 128 divisors (see below), whose sum is σ = 395280000. Its totient is φ = 39029760.

The previous prime is 129085673. The next prime is 129085727. The reversal of 129085704 is 407580921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287272 + ... + 287720.

It is an arithmetic number, because the mean of its divisors is an integer number (3088125).

Almost surely, 2^129085704 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 129085704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197640000).

129085704 is an abundant number, since it is smaller than the sum of its proper divisors (266194296).

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

129085704 is a wasteful number, since it uses less digits than its factorization.

129085704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 465 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 129085704 is about 11361.5889733787. The cubic root of 129085704 is about 505.3893073584.

The spelling of 129085704 in words is "one hundred twenty-nine million, eighty-five thousand, seven hundred four".