129039498 has 96 divisors (see below), whose sum is σ = 332916480. Its totient is φ = 35354880.

The previous prime is 129039497. The next prime is 129039509. The reversal of 129039498 is 894930921.

129039498 is a `hidden beast` number, since 129 + 0 + 39 + 498 = 666.

It is not an unprimeable number, because it can be changed into a prime (129039497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 414763 + ... + 415073.

It is an arithmetic number, because the mean of its divisors is an integer number (3467880).

Almost surely, 2^129039498 is an apocalyptic number.

129039498 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 129039498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166458240).

129039498 is an abundant number, since it is smaller than the sum of its proper divisors (203876982).

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

129039498 is a wasteful number, since it uses less digits than its factorization.

129039498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 129039498 is about 11359.5553610166. Note that the first 3 decimals coincide. The cubic root of 129039498 is about 505.3289990918.

The spelling of 129039498 in words is "one hundred twenty-nine million, thirty-nine thousand, four hundred ninety-eight".