129647648 has 24 divisors (see below), whose sum is σ = 274878828. Its totient is φ = 59837184.

The previous prime is 129647597. The next prime is 129647653. The reversal of 129647648 is 846746921.

It can be written as a sum of positive squares in 2 ways, for example, as 126067984 + 3579664 = 11228^2 + 1892^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155411 + ... + 156242.

Almost surely, 2^129647648 is an apocalyptic number.

It is an amenable number.

129647648 is an abundant number, since it is smaller than the sum of its proper divisors (145231180).

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

129647648 is a wasteful number, since it uses less digits than its factorization.

129647648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311676 (or 311668 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 129647648 is about 11386.2921093743. The cubic root of 129647648 is about 506.1216099149.

The spelling of 129647648 in words is "one hundred twenty-nine million, six hundred forty-seven thousand, six hundred forty-eight".