129747648 has 56 divisors (see below), whose sum is σ = 354380800. Its totient is φ = 41852160.

The previous prime is 129747643. The next prime is 129747649. The reversal of 129747648 is 846747921.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 129747597 and 129747606.

It is not an unprimeable number, because it can be changed into a prime (129747643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4948 + ... + 16851.

Almost surely, 2^129747648 is an apocalyptic number.

It is an amenable number.

129747648 is an abundant number, since it is smaller than the sum of its proper divisors (224633152).

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

129747648 is a wasteful number, since it uses less digits than its factorization.

129747648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21845 (or 21835 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 129747648 is about 11390.6825080853. The cubic root of 129747648 is about 506.2517039418.

The spelling of 129747648 in words is "one hundred twenty-nine million, seven hundred forty-seven thousand, six hundred forty-eight".