129383886 has 32 divisors (see below), whose sum is σ = 265547520. Its totient is φ = 42012864.

The previous prime is 129383879. The next prime is 129383899. The reversal of 129383886 is 688383921.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34575 + ... + 38133.

It is an arithmetic number, because the mean of its divisors is an integer number (8298360).

Almost surely, 2^129383886 is an apocalyptic number.

129383886 is an abundant number, since it is smaller than the sum of its proper divisors (136163634).

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

129383886 is a wasteful number, since it uses less digits than its factorization.

129383886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720.

The product of its digits is 497664, while the sum is 48.

The square root of 129383886 is about 11374.7037763627. The cubic root of 129383886 is about 505.7781500765.

The spelling of 129383886 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, eight hundred eighty-six".