129808158 has 16 divisors (see below), whose sum is σ = 274888080. Its totient is φ = 40724096.

The previous prime is 129808153. The next prime is 129808163. The reversal of 129808158 is 851808921.

It is an interprime number because it is at equal distance from previous prime (129808153) and next prime (129808163).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129808153) 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, 636213 + ... + 636416.

It is an arithmetic number, because the mean of its divisors is an integer number (17180505).

Almost surely, 2^129808158 is an apocalyptic number.

129808158 is an abundant number, since it is smaller than the sum of its proper divisors (145079922).

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

129808158 is a wasteful number, since it uses less digits than its factorization.

129808158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272651.

The product of its (nonzero) digits is 46080, while the sum is 42.

The square root of 129808158 is about 11393.3383167533. The cubic root of 129808158 is about 506.3303913791.

The spelling of 129808158 in words is "one hundred twenty-nine million, eight hundred eight thousand, one hundred fifty-eight".