129664488 has 16 divisors (see below), whose sum is σ = 324161280. Its totient is φ = 43221488.

The previous prime is 129664487. The next prime is 129664489. The reversal of 129664488 is 884466921.

It is an interprime number because it is at equal distance from previous prime (129664487) and next prime (129664489).

It is not an unprimeable number, because it can be changed into a prime (129664487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2701320 + ... + 2701367.

It is an arithmetic number, because the mean of its divisors is an integer number (20260080).

Almost surely, 2^129664488 is an apocalyptic number.

It is an amenable number.

129664488 is an abundant number, since it is smaller than the sum of its proper divisors (194496792).

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

129664488 is a wasteful number, since it uses less digits than its factorization.

129664488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5402696 (or 5402692 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The square root of 129664488 is about 11387.0315710461. The cubic root of 129664488 is about 506.1435224320.

The spelling of 129664488 in words is "one hundred twenty-nine million, six hundred sixty-four thousand, four hundred eighty-eight".