129616704 has 336 divisors, whose sum is σ = 471684096. Its totient is φ = 33177600.

The previous prime is 129616699. The next prime is 129616717. The reversal of 129616704 is 407616921.

It is a tau number, because it is divible by the number of its divisors (336).

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 47 ways as a sum of consecutive naturals, for example, 2124834 + ... + 2124894.

Almost surely, 2^129616704 is an apocalyptic number.

129616704 is a gapful number since it is divisible by the number (14) 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 129616704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235842048).

129616704 is an abundant number, since it is smaller than the sum of its proper divisors (342067392).

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

129616704 is a wasteful number, since it uses less digits than its factorization.

129616704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 129616704 is about 11384.9332013851. The cubic root of 129616704 is about 506.0813400668.

The spelling of 129616704 in words is "one hundred twenty-nine million, six hundred sixteen thousand, seven hundred four".