129807858 has 16 divisors (see below), whose sum is σ = 260606016. Its totient is φ = 43104240.

The previous prime is 129807851. The next prime is 129807859. The reversal of 129807858 is 858708921.

It is not an unprimeable number, because it can be changed into a prime (129807851) 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, 39553 + ... + 42708.

It is an arithmetic number, because the mean of its divisors is an integer number (16287876).

Almost surely, 2^129807858 is an apocalyptic number.

129807858 is an abundant number, since it is smaller than the sum of its proper divisors (130798158).

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

129807858 is a wasteful number, since it uses less digits than its factorization.

129807858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82529.

The product of its (nonzero) digits is 322560, while the sum is 48.

The square root of 129807858 is about 11393.3251511576. The cubic root of 129807858 is about 506.3300013182.

The spelling of 129807858 in words is "one hundred twenty-nine million, eight hundred seven thousand, eight hundred fifty-eight".