129548538 has 64 divisors (see below), whose sum is σ = 332190720. Its totient is φ = 36656496.

The previous prime is 129548521. The next prime is 129548557. The reversal of 129548538 is 835845921.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129548493 and 129548502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38845 + ... + 42047.

It is an arithmetic number, because the mean of its divisors is an integer number (5190480).

Almost surely, 2^129548538 is an apocalyptic number.

129548538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129548538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166095360).

129548538 is an abundant number, since it is smaller than the sum of its proper divisors (202642182).

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

129548538 is a wasteful number, since it uses less digits than its factorization.

129548538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328 (or 3322 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 129548538 is about 11381.9391142283. The cubic root of 129548538 is about 505.9926077024.

The spelling of 129548538 in words is "one hundred twenty-nine million, five hundred forty-eight thousand, five hundred thirty-eight".