129800636 has 24 divisors (see below), whose sum is σ = 268554720. Its totient is φ = 53710272.

The previous prime is 129800633. The next prime is 129800639. The reversal of 129800636 is 636008921.

It is an interprime number because it is at equal distance from previous prime (129800633) and next prime (129800639).

It is a junction number, because it is equal to n+sod(n) for n = 129800596 and 129800605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129800633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79115 + ... + 80738.

It is an arithmetic number, because the mean of its divisors is an integer number (11189780).

Almost surely, 2^129800636 is an apocalyptic number.

It is an amenable number.

129800636 is an abundant number, since it is smaller than the sum of its proper divisors (138754084).

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

129800636 is a wasteful number, since it uses less digits than its factorization.

129800636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159893 (or 159891 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 129800636 is about 11393.0082067907. The cubic root of 129800636 is about 506.3206110724.

The spelling of 129800636 in words is "one hundred twenty-nine million, eight hundred thousand, six hundred thirty-six".