129704736 has 48 divisors (see below), whose sum is σ = 389116224. Its totient is φ = 37058304.

The previous prime is 129704723. The next prime is 129704741. The reversal of 129704736 is 637407921.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 129704694 and 129704703.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95835 + ... + 97178.

It is an arithmetic number, because the mean of its divisors is an integer number (8106588).

Almost surely, 2^129704736 is an apocalyptic number.

129704736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129704736 is an abundant number, since it is smaller than the sum of its proper divisors (259411488).

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

129704736 is a wasteful number, since it uses less digits than its factorization.

129704736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193033 (or 193025 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 129704736 is about 11388.7987075020. The cubic root of 129704736 is about 506.1958861836.

The spelling of 129704736 in words is "one hundred twenty-nine million, seven hundred four thousand, seven hundred thirty-six".